| TMUX(1) | General Commands Manual | TMUX(1) |
tmux —
tmux |
[-2CDluvV]
[-c shell-command]
[-f file]
[-L socket-name]
[-S socket-path]
[-T features]
[command [flags]] |
tmux is a terminal multiplexer: it enables a number of
terminals to be created, accessed, and controlled from a single screen.
tmux may be detached from a screen and continue
running in the background, then later reattached.
When tmux is started it creates a new
session with a single window and
displays it on screen. A status line at the bottom of the screen shows
information on the current session and is used to enter interactive
commands.
A session is a single collection of pseudo
terminals under the management of tmux. Each
session has one or more windows linked to it. A window occupies the entire
screen and may be split into rectangular panes, each of which is a separate
pseudo terminal (the pty(4) manual page documents the
technical details of pseudo terminals). Any number of
tmux instances may connect to the same session, and
any number of windows may be present in the same session. Once all sessions
are killed, tmux exits.
Each session is persistent and will survive accidental
disconnection (such as ssh(1) connection timeout) or
intentional detaching (with the ‘C-b
d’ key strokes). tmux may be
reattached using:
$ tmux attachIn tmux, a session is displayed on screen
by a client and all sessions are managed by a single
server. The server and each client are separate processes
which communicate through a socket in /tmp.
The options are as follows:
-2tmux to assume the terminal supports 256
colours. This is equivalent to -T
256.-C-CC) disables
echo.-c
shell-commandtmux server will be started to
retrieve the default-shell option. This option is
for compatibility with sh(1) when
tmux is used as a login shell.-Dtmux server as a daemon. This
also turns the exit-empty option off. With
-D, command may not be
specified.-f
filetmux loads the system configuration file from
/etc/tmux.conf, if present, then looks for a user
configuration file at ~/.tmux.conf.
The configuration file is a set of
tmux commands which are executed in sequence
when the server is first started. tmux loads
configuration files once when the server process has started. The
source-file command may be used to load a file
later.
tmux shows any error messages from
commands in configuration files in the first session created, and
continues to process the rest of the configuration file.
-L
socket-nametmux stores the server socket in a directory under
TMUX_TMPDIR or /tmp if it
is unset. The default socket is named default. This
option allows a different socket name to be specified, allowing several
independent tmux servers to be run. Unlike
-S a full path is not necessary: the sockets are
all created in a directory tmux-UID under the
directory given by TMUX_TMPDIR or in
/tmp. The tmux-UID
directory is created by tmux and must not be world
readable, writable or executable.
If the socket is accidentally removed, the
SIGUSR1 signal may be sent to the
tmux server process to recreate it (note that
this will fail if any parent directories are missing).
-l-S
socket-path-S is specified, the default socket directory is
not used and any -L flag is ignored.-uLC_ALL, LC_CTYPE, or
LANG that is set does not contain
“UTF-8” or “UTF8”. This is equivalent to
-T UTF-8.-T
featuresterminal-features option.-v-v is specified twice, an additional
tmux-out-PID.log file is generated with a copy of
everything tmux writes to the terminal.
The SIGUSR2 signal may be sent to the
tmux server process to toggle logging between on
(as if -v was given) and off.
-Vtmux version.tmux, as described in the following sections. If
no commands are specified, the new-session command
is assumed.tmux may be controlled from an attached client by using
a key combination of a prefix key, ‘C-b’
(Ctrl-b) by default, followed by a command key.
The default command key bindings are:
tmux client.tmux command prompt.select-pane
-m).tmux, if any.Key bindings may be changed with the
bind-key and unbind-key
commands.
tmux supports a large number of commands which can be
used to control its behaviour. Each command is named and can accept zero or
more flags and arguments. They may be bound to a key with the
bind-key command or run from the shell prompt, a shell
script, a configuration file or the command prompt. For example, the same
set-option command run from the shell prompt, from
~/.tmux.conf and bound to a key may look like:
$ tmux set-option -g status-style bg=cyan set-option -g status-style bg=cyan bind-key C set-option -g status-style bg=cyan
Here, the command name is
‘set-option’,
‘-gstatus-style’ and
‘bg=cyan’ are arguments.
tmux distinguishes between command parsing
and execution. In order to execute a command, tmux
needs it to be split up into its name and arguments. This is command
parsing. If a command is run from the shell, the shell parses it; from
inside tmux or from a configuration file,
tmux does. Examples of when
tmux parses commands are:
command-prompt);bind-key;if-shell or
confirm-before.To execute commands, each client has a
‘command queue’. A global command
queue not attached to any client is used on startup for configuration files
like ~/.tmux.conf. Parsed commands added to the
queue are executed in order. Some commands, like
if-shell and confirm-before,
parse their argument to create a new command which is inserted immediately
after themselves. This means that arguments can be parsed twice or more -
once when the parent command (such as if-shell) is
parsed and again when it parses and executes its command. Commands like
if-shell, run-shell and
display-panes stop execution of subsequent commands
on the queue until something happens - if-shell and
run-shell until a shell command finishes and
display-panes until a key is pressed. For example,
the following commands:
new-session; new-window if-shell "true" "split-window" kill-session
Will execute new-session,
new-window, if-shell, the
shell command true(1),
split-window and
kill-session in that order.
The COMMANDS section lists the
tmux commands and their arguments.
tmux, for example in a configuration file or at the
command prompt. Note that when commands are entered into the shell, they are
parsed by the shell - see for example ksh(1) or
csh(1).
Each command is terminated by a newline or a semicolon (;).
Commands separated by semicolons together form a
‘command sequence’ - if a command in
the sequence encounters an error, no subsequent commands are executed.
Comments are marked by the unquoted # character - any remaining text after a comment is ignored until the end of the line.
If the last character of a line is \, the line is joined with the following line (the \ and the newline are completely removed). This is called line continuation and applies both inside and outside quoted strings and in comments, but not inside braces.
Command arguments may be specified as strings surrounded by single (') quotes, double quotes (") or braces ({}). This is required when the argument contains any special character. Single and double quoted strings cannot span multiple lines except with line continuation. Braces can span multiple lines.
Outside of quotes and inside double quotes, these replacements are performed:
Braces are parsed as a configuration file (so conditions such as
‘%if’ are processed) and then
converted into a string. They are designed to avoid the need for additional
escaping when passing a group of tmux commands as an
argument (for example to if-shell). These two
examples produce an identical command - note that no escaping is needed when
using {}:
if-shell true {
display -p 'brace-dollar-foo: }$foo'
}
if-shell true "display -p 'brace-dollar-foo: }\$foo'"
Braces may be enclosed inside braces, for example:
bind x if-shell "true" {
if-shell "true" {
display "true!"
}
}
Environment variables may be set by using the syntax
‘name=value’, for example
‘HOME=/home/user’. Variables set
during parsing are added to the global environment. A hidden variable may be
set with ‘%hidden’, for example:
%hidden MYVAR=42
Hidden variables are not passed to the environment of processes created by tmux. See the GLOBAL AND SESSION ENVIRONMENT section.
Commands may be parsed conditionally by surrounding them with
‘%if’,
‘%elif’,
‘%else’ and
‘%endif’. The argument to
‘%if’ and
‘%elif’ is expanded as a format (see
FORMATS) and if it evaluates to false
(zero or empty), subsequent text is ignored until the closing
‘%elif’,
‘%else’ or
‘%endif’. For example:
%if "#{==:#{host},myhost}"
set -g status-style bg=red
%elif "#{==:#{host},myotherhost}"
set -g status-style bg=green
%else
set -g status-style bg=blue
%endif
Will change the status line to red if running on
‘myhost’, green if running on
‘myotherhost’, or blue if running on
another host. Conditionals may be given on one line, for example:
%if #{==:#{host},myhost} set -g status-style bg=red %endif
tmux.
Most commands accept the optional -t (and sometimes
-s) argument with one of
target-client, target-session,
target-window, or target-pane.
These specify the client, session, window or pane which a command should
affect.
target-client should be the name of the
client, typically the pty(4) file to which the client is
connected, for example either of /dev/ttyp1 or
ttyp1 for the client attached to
/dev/ttyp1. If no client is specified,
tmux attempts to work out the client currently in
use; if that fails, an error is reported. Clients may be listed with the
list-clients command.
target-session is tried as, in order:
list-sessions command).mysess’ would match a session named
‘mysession’.If the session name is prefixed with an
‘=’, only an exact match is accepted
(so ‘=mysess’ will only match exactly
‘mysess’, not
‘mysession’).
If a single session is found, it is used as the target session; multiple matches produce an error. If a session is omitted, the current session is used if available; if no current session is available, the most recently used is chosen.
target-window (or src-window or dst-window) specifies a window in the form session:window. session follows the same rules as for target-session, and window is looked for in order as:
mysession:1’ is window 1 in session
‘mysession’.mysession:mywindow’.mysession:mywin’.Like sessions, a ‘=’ prefix
will do an exact match only. An empty window name specifies the next unused
index if appropriate (for example the new-window and
link-window commands) otherwise the current window
in session is chosen.
The following special tokens are available to indicate particular windows. Each has a single-character alternative form.
| Token | Meaning | |
{start} |
^ | The lowest-numbered window |
{end} |
$ | The highest-numbered window |
{last} |
! | The last (previously current) window |
{next} |
+ | The next window by number |
{previous} |
- | The previous window by number |
target-pane (or
src-pane or dst-pane) may be a
pane ID or takes a similar form to target-window but
with the optional addition of a period followed by a pane index or pane ID,
for example: ‘mysession:mywindow.1’.
If the pane index is omitted, the currently active pane in the specified
window is used. The following special tokens are available for the pane
index:
| Token | Meaning | |
{last} |
! | The last (previously active) pane |
{next} |
+ | The next pane by number |
{previous} |
- | The previous pane by number |
{top} |
The top pane | |
{bottom} |
The bottom pane | |
{left} |
The leftmost pane | |
{right} |
The rightmost pane | |
{top-left} |
The top-left pane | |
{top-right} |
The top-right pane | |
{bottom-left} |
The bottom-left pane | |
{bottom-right} |
The bottom-right pane | |
{up-of} |
The pane above the active pane | |
{down-of} |
The pane below the active pane | |
{left-of} |
The pane to the left of the active pane | |
{right-of} |
The pane to the right of the active pane |
The tokens ‘+’ and
‘-’ may be followed by an offset, for
example:
select-window -t:+2
In addition, target-session,
target-window or target-pane may consist
entirely of the token ‘{mouse}’
(alternative form ‘=’) to specify the
session, window or pane where the most recent mouse event occurred (see the
MOUSE SUPPORT section) or
‘{marked}’ (alternative form
‘~’) to specify the marked pane (see
select-pane -m).
Sessions, window and panes are each numbered with a unique ID;
session IDs are prefixed with a ‘$’,
windows with a ‘@’, and panes with a
‘%’. These are unique and are
unchanged for the life of the session, window or pane in the
tmux server. The pane ID is passed to the child
process of the pane in the TMUX_PANE environment
variable. IDs may be displayed using the
‘session_id’,
‘window_id’, or
‘pane_id’ formats (see the
FORMATS section) and the
display-message,
list-sessions, list-windows
or list-panes commands.
shell-command arguments are sh(1) commands. This may be a single argument passed to the shell, for example:
new-window 'vi /etc/passwd'
Will run:
/bin/sh -c 'vi /etc/passwd'
Additionally, the new-window,
new-session, split-window,
respawn-window and
respawn-pane commands allow
shell-command to be given as multiple arguments and
executed directly (without ‘sh -c’).
This can avoid issues with shell quoting. For example:
$ tmux new-window vi /etc/passwd
Will run vi(1) directly without invoking the shell.
command [arguments]
refers to a tmux command, either passed with the
command and arguments separately, for example:
bind-key F1 set-option status off
Or passed as a single string argument in .tmux.conf, for example:
bind-key F1 { set-option status off }
Example tmux commands include:
refresh-client -t/dev/ttyp2 rename-session -tfirst newname set-option -wt:0 monitor-activity on new-window ; split-window -d bind-key R source-file ~/.tmux.conf \; \ display-message "source-file done"
Or from sh(1):
$ tmux kill-window -t :1 $ tmux new-window \; split-window -d $ tmux new-session -d 'vi /etc/passwd' \; split-window -d \; attach
tmux server manages clients, sessions, windows and
panes. Clients are attached to sessions to interact with them, either when
they are created with the new-session command, or
later with the attach-session command. Each session
has one or more windows linked into it. Windows may be
linked to multiple sessions and are made up of one or more panes, each of
which contains a pseudo terminal. Commands for creating, linking and otherwise
manipulating windows are covered in the
WINDOWS AND PANES section.
The following commands are available to manage clients and sessions:
attach-session
[-dErx] [-c
working-directory] [-f
flags] [-t
target-session]attach)tmux, create a new client in the
current terminal and attach it to target-session. If
used from inside, switch the current client. If -d
is specified, any other clients attached to the session are detached. If
-x is given, send SIGHUP
to the parent process of the client as well as detaching the client,
typically causing it to exit. -f sets a
comma-separated list of client flags. The flags are:
A leading ‘’! turns a
flag off if the client is already attached. -r
is an alias for -f
read-only,ignore-size. When a client is read-only,
only keys bound to the detach-client or
switch-client commands have any effect. A client
with the active-pane flag allows the active pane
to be selected independently of the window's active pane used by clients
without the flag. This only affects the cursor position and commands
issued from the client; other features such as hooks and styles continue
to use the window's active pane.
If no server is started,
attach-session will attempt to start it; this
will fail unless sessions are created in the configuration file.
The target-session rules for
attach-session are slightly adjusted: if
tmux needs to select the most recently used
session, it will prefer the most recently used
unattached session.
-c will set the session working
directory (used for new windows) to
working-directory.
If -E is used, the
update-environment option will not be
applied.
detach-client
[-aP] [-E
shell-command] [-s
target-session] [-t
target-client]detach)-t, or all clients currently attached to the
session specified by -s. The
-a option kills all but the client given with
-t. If -P is given, send
SIGHUP to the parent process of the client,
typically causing it to exit. With -E, run
shell-command to replace the client.has-session
[-t target-session]has)kill-servertmux server and clients and destroy all
sessions.kill-session
[-aC] [-t
target-session]-a is given, all sessions but the specified one is
killed. The -C flag clears alerts (bell, activity,
or silence) in all windows linked to the session.list-clients
[-F format]
[-t target-session]lsc)-F flag, see the
FORMATS section. If
target-session is specified, list only clients
connected to that session.list-commands
[-F format]
[command]lscm)tmux.list-sessions
[-F format]
[-f filter]ls)-F
specifies the format of each line and -f a filter.
Only sessions for which the filter is true are shown. See the
FORMATS section.lock-client
[-t target-client]lockc)lock-server command.lock-session
[-t target-session]locks)new-session
[-AdDEPX] [-c
start-directory] [-e
environment] [-f
flags] [-F
format] [-n
window-name] [-s
session-name] [-t
group-name] [-x
width] [-y
height] [shell-command]new)The new session is attached to the current terminal unless
-d is given. window-name
and shell-command are the name of and shell
command to execute in the initial window. With
-d, the initial size comes from the global
default-size option; -x
and -y can be used to specify a different size.
‘-’ uses the size of the current
client if any. If -x or
-y is given, the
default-size option is set for the session.
-f sets a comma-separated list of client flags
(see attach-session).
If run from a terminal, any termios(4) special characters are saved and used for new windows in the new session.
The -A flag makes
new-session behave like
attach-session if
session-name already exists; in this case,
-D behaves like -d to
attach-session, and -X
behaves like -x to
attach-session.
If -t is given, it specifies a
session group. Sessions in the same group share
the same set of windows - new windows are linked to all sessions in the
group and any windows closed removed from all sessions. The current and
previous window and any session options remain independent and any
session in a group may be killed without affecting the others. The
group-name argument may be:
-n and
shell-command are invalid if
-t is used.
The -P option prints information about
the new session after it has been created. By default, it uses the
format ‘#{session_name}:’ but a
different format may be specified with -F.
If -E is used, the
update-environment option will not be applied.
-e takes the form
‘VARIABLE=value’ and sets an
environment variable for the newly created session; it may be specified
multiple times.
refresh-client
[-cDlLRSU] [-A
pane:state] [-B
name:what:format] [-C
XxY] [-f
flags] [-t
target-client] [adjustment]refresh)-t. If -S is
specified, only update the client's status line.
The -U, -D,
-L -R, and
-c flags allow the visible portion of a window
which is larger than the client to be changed.
-U moves the visible part up by
adjustment rows and -D
down, -L left by
adjustment columns and -R
right. -c returns to tracking the cursor
automatically. If adjustment is omitted, 1 is
used. Note that the visible position is a property of the client not of
the window, changing the current window in the attached session will
reset it.
-C sets the width and height of a
control mode client. -A allows a control mode
client to trigger actions on a pane. The argument is a pane ID (with
leading ‘%’), a colon, then one of
‘on’,
‘off’,
‘continue’ or
‘pause’. If
‘off’,
tmux will not send output from the pane to the
client and if all clients have turned the pane off, will stop reading
from the pane. If ‘continue’,
tmux will return to sending output to the pane
if it was paused (manually or with the pause-after
flag). If ‘pause’,
tmux will pause the pane.
-A may be given multiple times for different
panes.
-B sets a subscription to a format for
a control mode client. The argument is split into three items by colons:
name is a name for the subscription;
what is a type of item to subscribe to;
format is the format. After a subscription is
added, changes to the format are reported with the
%subscription-changed notification, at most once
a second. If only the name is given, the subscription is removed.
what may be empty to check the format only for the
attached session, or one of: a pane ID such as
‘%0’;
‘%*’ for all panes in the attached
session; an window ID such as
‘@0’; or
‘@*’ for all windows in the
attached session.
-f sets a comma-separated list of
client flags, see attach-session.
-l requests the clipboard from the
client using the xterm(1) escape sequence and stores
it in a new paste buffer.
-L, -R,
-U and -D move the
visible portion of the window left, right, up or down by
adjustment, if the window is larger than the
client. -c resets so that the position follows
the cursor. See the window-size option.
rename-session
[-t target-session]
new-namerename)show-messages
[-JT] [-t
target-client]showmsgs)-J and -T show debugging
information about jobs and terminals.source-file
[-nqv] path
...source)-q is given, no error will be
returned if path does not exist. With
-n, the file is parsed but no commands are
executed. -v shows the parsed commands and line
numbers if possible.start-serverstart)tmux server, if not already running,
without creating any sessions.
Note that as by default the tmux
server will exit with no sessions, this is only useful if a session is
created in ~/.tmux.conf,
exit-empty is turned off, or another command is
run as part of the same command sequence. For example:
$ tmux start \; show -g
suspend-client
[-t target-client]suspendc)SIGTSTP (tty stop).switch-client
[-ElnprZ] [-c
target-client] [-t
target-session] [-T
key-table]switchc)-t may refer to a pane (a target that contains
‘:’,
‘.’ or
‘%’), to change session, window and
pane. In that case, -Z keeps the window zoomed if
it was zoomed. If -l, -n
or -p is used, the client is moved to the last,
next or previous session respectively. -r toggles
the client read-only and
ignore-size flags (see the
attach-session command).
If -E is used,
update-environment option will not be
applied.
-T sets the client's key table; the
next key from the client will be interpreted from
key-table. This may be used to configure multiple
prefix keys, or to bind commands to sequences of keys. For example, to
make typing ‘abc’ run the
list-keys command:
bind-key -Ttable2 c list-keys
bind-key -Ttable1 b switch-client -Ttable2
bind-key -Troot a switch-client -Ttable1
tmux may be split into one or
more panes; each pane takes up a certain area of the display
and is a separate terminal. A window may be split into panes using the
split-window command. Windows may be split
horizontally (with the -h flag) or vertically. Panes
may be resized with the resize-pane command (bound to
‘C-Up’,
‘C-Down’
‘C-Left’ and
‘C-Right’ by default), the current pane
may be changed with the select-pane command and the
rotate-window and swap-pane
commands may be used to swap panes without changing their position. Panes are
numbered beginning from zero in the order they are created.
By default, a tmux pane permits direct
access to the terminal contained in the pane. A pane may also be put into
one of several modes:
copy-mode
command, bound to ‘[’ by default.
Copied text can be pasted with the paste-buffer
command, bound to ‘]’.list-keys, is executed
from a key binding.choose-buffer,
choose-client and
choose-tree commands.In copy mode an indicator is displayed in the top-right corner of the pane with the current position and the number of lines in the history.
Commands are sent to copy mode using the
-X flag to the send-keys
command. When a key is pressed, copy mode automatically uses one of two key
tables, depending on the mode-keys option:
copy-mode for emacs, or
copy-mode-vi for vi. Key tables may be viewed with
the list-keys command.
The following commands are supported in copy mode:
The search commands come in several varieties:
‘search-forward’ and
‘search-backward’ search for a regular
expression; the ‘-text’ variants
search for a plain text string rather than a regular expression;
‘-incremental’ perform an incremental
search and expect to be used with the -i flag to the
command-prompt command.
‘search-again’ repeats the last search
and ‘search-reverse’ does the same but
reverses the direction (forward becomes backward and backward becomes
forward).
Copy commands may take an optional buffer prefix argument which is
used to generate the buffer name (the default is
‘buffer’ so buffers are named
‘buffer0’,
‘buffer1’ and so on). Pipe commands
take a command argument which is the command to which the copied text is
piped. The ‘-and-cancel’ variants of
some commands exit copy mode after they have completed (for copy commands)
or when the cursor reaches the bottom (for scrolling commands).
‘-no-clear’ variants do not clear the
selection.
The next and previous word keys use space and the
‘-’,
‘_’ and
‘@’ characters as word delimiters by
default, but this can be adjusted by setting the
word-separators session option. Next word moves to the
start of the next word, next word end to the end of the next word and
previous word to the start of the previous word. The three next and previous
space keys work similarly but use a space alone as the word separator.
The jump commands enable quick movement within a line. For
instance, typing ‘f’ followed by
‘/’ will move the cursor to the next
‘/’ character on the current line. A
‘;’ will then jump to the next
occurrence.
Commands in copy mode may be prefaced by an optional repeat count. With vi key bindings, a prefix is entered using the number keys; with emacs, the Alt (meta) key and a number begins prefix entry.
The synopsis for the copy-mode command
is:
copy-mode
[-eHMqu] [-s
src-pane] [-t
target-pane]-u option scrolls one page
up. -M begins a mouse drag (only valid if bound to
a mouse key binding, see MOUSE
SUPPORT). -H hides the position indicator in
the top right. -q cancels copy mode and any other
modes. -s copies from
src-pane instead of
target-pane.
-e specifies that scrolling to the
bottom of the history (to the visible screen) should exit copy mode.
While in copy mode, pressing a key other than those used for scrolling
will disable this behaviour. This is intended to allow fast scrolling
through a pane's history, for example with:
bind PageUp copy-mode -eu
A number of preset arrangements of panes are available, these are
called layouts. These may be selected with the
select-layout command or cycled with
next-layout (bound to
‘Space’ by default); once a layout is
chosen, panes within it may be moved and resized as normal.
The following layouts are supported:
even-horizontaleven-verticalmain-horizontalmain-verticalmain-horizontal but the large pane is
placed on the left and the others spread from top to bottom along the
right. See the main-pane-width window option.tiledIn addition, select-layout may be used to
apply a previously used layout - the list-windows
command displays the layout of each window in a form suitable for use with
select-layout. For example:
$ tmux list-windows
0: ksh [159x48]
layout: bb62,159x48,0,0{79x48,0,0,79x48,80,0}
$ tmux select-layout bb62,159x48,0,0{79x48,0,0,79x48,80,0}
tmux automatically adjusts the size of the
layout for the current window size. Note that a layout cannot be applied to
a window with more panes than that from which the layout was originally
defined.
Commands related to windows and panes are as follows:
break-pane
[-abdP] [-F
format] [-n
window-name] [-s
src-pane] [-t
dst-window]breakp)-a or -b, the window is
moved to the next index after or before (existing windows are moved if
necessary). If -d is given, the new window does
not become the current window. The -P option
prints information about the new window after it has been created. By
default, it uses the format
‘#{session_name}:#{window_index}’
but a different format may be specified with
-F.capture-pane
[-aepPqCJN] [-b
buffer-name] [-E
end-line] [-S
start-line] [-t
target-pane]capturep)-p is given, the
output goes to stdout, otherwise to the buffer specified with
-b or a new buffer if omitted. If
-a is given, the alternate screen is used, and the
history is not accessible. If no alternate screen exists, an error will be
returned unless -q is given. If
-e is given, the output includes escape sequences
for text and background attributes. -C also
escapes non-printable characters as octal \xxx. -N
preserves trailing spaces at each line's end and
-J preserves trailing spaces and joins any wrapped
lines. -P captures only any output that the pane
has received that is the beginning of an as-yet incomplete escape
sequence.
-S and -E
specify the starting and ending line numbers, zero is the first line of
the visible pane and negative numbers are lines in the history.
‘-’ to -S
is the start of the history and to -E the end of
the visible pane. The default is to capture only the visible contents of
the pane.
choose-client
[-NrZ] [-F
format] [-f
filter] [-O
sort-order] [-t
target-pane] [template]-Z zooms the pane. The
following keys may be used in client mode:
| Key | Function |
Enter |
Choose selected client |
Up |
Select previous client |
Down |
Select next client |
C-s |
Search by name |
n |
Repeat last search |
t |
Toggle if client is tagged |
T |
Tag no clients |
C-t |
Tag all clients |
d |
Detach selected client |
D |
Detach tagged clients |
x |
Detach and HUP selected client |
X |
Detach and HUP tagged clients |
z |
Suspend selected client |
Z |
Suspend tagged clients |
f |
Enter a format to filter items |
O |
Change sort field |
r |
Reverse sort order |
v |
Toggle preview |
q |
Exit mode |
After a client is chosen,
‘%%’ is replaced by the client
name in template and the result executed as a
command. If template is not given,
"detach-client -t '%%'" is used.
-O specifies the initial sort field:
one of ‘name’,
‘size’,
‘creation’, or
‘activity’.
-r reverses the sort order.
-f specifies an initial filter: the filter is a
format - if it evaluates to zero, the item in the list is not shown,
otherwise it is shown. If a filter would lead to an empty list, it is
ignored. -F specifies the format for each item
in the list. -N starts without the preview. This
command works only if at least one client is attached.
choose-tree
[-GNrswZ] [-F
format] [-f
filter] [-O
sort-order] [-t
target-pane] [template]-s starts with sessions
collapsed and -w with windows collapsed.
-Z zooms the pane. The following keys may be used
in tree mode:
| Key | Function |
Enter |
Choose selected item |
Up |
Select previous item |
Down |
Select next item |
+ |
Expand selected item |
- |
Collapse selected item |
M-+ |
Expand all items |
M-- |
Collapse all items |
x |
Kill selected item |
X |
Kill tagged items |
< |
Scroll list of previews left |
> |
Scroll list of previews right |
C-s |
Search by name |
m |
Set the marked pane |
M |
Clear the marked pane |
n |
Repeat last search |
t |
Toggle if item is tagged |
T |
Tag no items |
C-t |
Tag all items |
: |
Run a command for each tagged item |
f |
Enter a format to filter items |
H |
Jump to the starting pane |
O |
Change sort field |
r |
Reverse sort order |
v |
Toggle preview |
q |
Exit mode |
After a session, window or pane is chosen,
‘%%’ is replaced by the target in
template and the result executed as a command. If
template is not given, "switch-client -t
'%%'" is used.
-O specifies the initial sort field:
one of ‘index’,
‘name’, or
‘time’. -r
reverses the sort order. -f specifies an initial
filter: the filter is a format - if it evaluates to zero, the item in
the list is not shown, otherwise it is shown. If a filter would lead to
an empty list, it is ignored. -F specifies the
format for each item in the tree. -N starts
without the preview. -G includes all sessions in
any session groups in the tree rather than only the first. This command
works only if at least one client is attached.
customize-mode
[-NZ] [-F
format] [-f
filter] [-t
target-pane] [template]-Z zooms
the pane. The following keys may be used in customize mode:
| Key | Function |
Enter |
Set pane, window, session or global option value |
Up |
Select previous item |
Down |
Select next item |
+ |
Expand selected item |
- |
Collapse selected item |
M-+ |
Expand all items |
M-- |
Collapse all items |
s |
Set option value or key attribute |
S |
Set global option value |
w |
Set window option value, if option is for pane and window |
d |
Set an option or key to the default |
D |
Set tagged options and tagged keys to the default |
u |
Unset an option (set to default value if global) or unbind a key |
U |
Unset tagged options and unbind tagged keys |
C-s |
Search by name |
n |
Repeat last search |
t |
Toggle if item is tagged |
T |
Tag no items |
C-t |
Tag all items |
f |
Enter a format to filter items |
v |
Toggle option information |
q |
Exit mode |
-f specifies an initial filter: the
filter is a format - if it evaluates to zero, the item in the list is
not shown, otherwise it is shown. If a filter would lead to an empty
list, it is ignored. -F specifies the format for
each item in the tree. -N starts without the
option information. This command works only if at least one client is
attached.
display-panes
[-b] [-d
duration] [-t
target-client] [template]displayp)display-panes-colour and
display-panes-active-colour session options. The
indicator is closed when a key is pressed or
duration milliseconds have passed. If
-d is not given,
display-panes-time is used. A duration of zero
means the indicator stays until a key is pressed. While the indicator is
on screen, a pane may be chosen with the
‘0’ to
‘9’ keys, which will cause
template to be executed as a command with
‘%%’ substituted by the pane ID. The
default template is "select-pane -t '%%'".
With -b, other commands are not blocked from
running until the indicator is closed.find-window
[-iCNrTZ] [-t
target-pane] match-stringfindw)-r, regular expression
match-string in window names, titles, and visible
content (but not history). The flags control matching behavior:
-C matches only visible window contents,
-N matches only the window name and
-T matches only the window title.
-i makes the search ignore case. The default is
-CNT. -Z zooms the pane.
This command works only if at least one client is attached.
join-pane
[-bdfhv] [-l
size] [-s
src-pane] [-t
dst-pane]joinp)split-window, but instead of splitting
dst-pane and creating a new pane, split it and move
src-pane into the space. This can be used to reverse
break-pane. The -b option
causes src-pane to be joined to left of or above
dst-pane.
If -s is omitted and a marked pane is
present (see select-pane
-m), the marked pane is used rather than the
current pane.
kill-pane
[-a] [-t
target-pane]killp)-a option kills all but the
pane given with -t.kill-window
[-a] [-t
target-window]killw)-a option kills all but
the window given with -t.last-pane
[-deZ] [-t
target-window]lastp)-Z keeps
the window zoomed if it was zoomed. -e enables or
-d disables input to the pane.last-window
[-t target-session]last)link-window
[-abdk] [-s
src-window] [-t
dst-window]linkw)-a or
-b the window is moved to the next index after or
before dst-window (existing windows are moved if
necessary). If -k is given and
dst-window exists, it is killed, otherwise an error
is generated. If -d is given, the newly linked
window is not selected.list-panes
[-as] [-F
format] [-f
filter] [-t
target]lsp)-a is given, target is
ignored and all panes on the server are listed. If
-s is given, target is a
session (or the current session). If neither is given,
target is a window (or the current window).
-F specifies the format of each line and
-f a filter. Only panes for which the filter is
true are shown. See the FORMATS
section.list-windows
[-a] [-F
format] [-f
filter] [-t
target-session]lsw)-a is given, list all windows on the server.
Otherwise, list windows in the current session or in
target-session. -F specifies
the format of each line and -f a filter. Only
windows for which the filter is true are shown. See the
FORMATS section.move-pane
[-bdfhv] [-l
size] [-s
src-pane] [-t
dst-pane]movep)join-pane.move-window
[-abrdk] [-s
src-window] [-t
dst-window]movew)link-window, except the window at
src-window is moved to
dst-window. With -r, all
windows in the session are renumbered in sequential order, respecting the
base-index option.new-window
[-abdkP] [-c
start-directory] [-e
environment] [-F
format] [-n
window-name] [-t
target-window]
[shell-command]neww)-a or
-b, the new window is inserted at the next index
after or before the specified target-window, moving
windows up if necessary; otherwise target-window is
the new window location.
If -d is given, the session does not
make the new window the current window.
target-window represents the window to be created;
if the target already exists an error is shown, unless the
-k flag is used, in which case it is destroyed.
shell-command is the command to execute. If
shell-command is not specified, the value of the
default-command option is used.
-c specifies the working directory in which the
new window is created.
When the shell command completes, the window closes. See the
remain-on-exit option to change this
behaviour.
-e takes the form
‘VARIABLE=value’ and sets an
environment variable for the newly created window; it may be specified
multiple times.
The TERM environment variable must be
set to ‘screen’ or
‘tmux’ for all programs running
inside tmux. New windows will
automatically have ‘TERM=screen’
added to their environment, but care must be taken not to reset this in
shell start-up files or by the -e option.
The -P option prints information about
the new window after it has been created. By default, it uses the format
‘#{session_name}:#{window_index}’
but a different format may be specified with
-F.
next-layout
[-t target-window]nextl)next-window
[-a] [-t
target-session]next)-a is
used, move to the next window with an alert.pipe-pane
[-IOo] [-t
target-pane]
[shell-command]pipep)status-left
option. If no shell-command is given, the current
pipe (if any) is closed.
-I and -O
specify which of the shell-command output streams
are connected to the pane: with -I stdout is
connected (so anything shell-command prints is
written to the pane as if it were typed); with
-O stdin is connected (so any output in the pane
is piped to shell-command). Both may be used
together and if neither are specified, -O is
used.
The -o option only opens a new pipe if
no previous pipe exists, allowing a pipe to be toggled with a single
key, for example:
bind-key C-p pipe-pane -o 'cat >>~/output.#I-#P'
previous-layout
[-t target-window]prevl)previous-window
[-a] [-t
target-session]prev)-a,
move to the previous window with an alert.rename-window
[-t target-window]
new-namerenamew)resize-pane
[-DLMRTUZ] [-t
target-pane] [-x
width] [-y
height] [adjustment]resizep)-U, -D,
-L or -R, or to an
absolute size with -x or
-y. The adjustment is given
in lines or columns (the default is 1); -x and
-y may be a given as a number of lines or columns
or followed by ‘%’ for a percentage
of the window size (for example ‘-x
10%’). With -Z, the active pane is
toggled between zoomed (occupying the whole of the window) and unzoomed
(its normal position in the layout).
-M begins mouse resizing (only valid
if bound to a mouse key binding, see
MOUSE SUPPORT).
-T trims all lines below the current
cursor position and moves lines out of the history to replace them.
resize-window
[-aADLRU] [-t
target-window] [-x
width] [-y
height] [adjustment]resizew)-U, -D,
-L or -R, or to an
absolute size with -x or
-y. The adjustment is given
in lines or cells (the default is 1). -A sets the
size of the largest session containing the window;
-a the size of the smallest. This command will
automatically set window-size to manual in the
window options.respawn-pane
[-k] [-c
start-directory] [-e
environment] [-t
target-pane]
[shell-command]respawnp)remain-on-exit window option). If
shell-command is not given, the command used when
the pane was created or last respawned is executed. The pane must be
already inactive, unless -k is given, in which
case any existing command is killed. -c specifies
a new working directory for the pane. The -e
option has the same meaning as for the new-window
command.respawn-window
[-k] [-c
start-directory] [-e
environment] [-t
target-window]
[shell-command]respawnw)remain-on-exit window option). If
shell-command is not given, the command used when
the window was created or last respawned is executed. The window must be
already inactive, unless -k is given, in which
case any existing command is killed. -c specifies
a new working directory for the window. The -e
option has the same meaning as for the new-window
command.rotate-window
[-DUZ] [-t
target-window]rotatew)-U or downward
(numerically higher). -Z keeps the window zoomed
if it was zoomed.select-layout
[-Enop] [-t
target-pane] [layout-name]selectl)-n and -p are equivalent
to the next-layout and
previous-layout commands.
-o applies the last set layout if possible (undoes
the most recent layout change). -E spreads the
current pane and any panes next to it out evenly.select-pane
[-DdeLlMmRUZ] [-T
title] [-t
target-pane]selectp)-D, -L,
-R, or -U is used,
respectively the pane below, to the left, to the right, or above the
target pane is used. -Z keeps the window zoomed if
it was zoomed. -l is the same as using the
last-pane command. -e
enables or -d disables input to the pane.
-T sets the pane title.
-m and -M are
used to set and clear the marked pane. There is one
marked pane at a time, setting a new marked pane clears the last. The
marked pane is the default target for -s to
join-pane, move-pane,
swap-pane and
swap-window.
select-window
[-lnpT] [-t
target-window]selectw)-l, -n and
-p are equivalent to the
last-window, next-window
and previous-window commands. If
-T is given and the selected window is already the
current window, the command behaves like
last-window.split-window
[-bdfhIvP] [-c
start-directory] [-e
environment] [-l
size] [-t
target-pane] [shell-command]
[-F format]splitw)-h does a horizontal split and
-v a vertical split; if neither is specified,
-v is assumed. The -l
option specifies the size of the new pane in lines (for vertical split) or
in columns (for horizontal split); size may be
followed by ‘%’ to specify a
percentage of the available space. The -b option
causes the new pane to be created to the left of or above
target-pane. The -f option
creates a new pane spanning the full window height (with
-h) or full window width (with
-v), instead of splitting the active pane.
An empty shell-command ('') will create
a pane with no command running in it. Output can be sent to such a pane
with the display-message command. The
-I flag (if shell-command
is not specified or empty) will create an empty pane and forward any
output from stdin to it. For example:
$ make 2>&1|tmux splitw -dI &
All other options have the same meaning as for the
new-window command.
swap-pane
[-dDUZ] [-s
src-pane] [-t
dst-pane]swapp)-U is used and no source pane is
specified with -s, dst-pane
is swapped with the previous pane (before it numerically);
-D swaps with the next pane (after it
numerically). -d instructs
tmux not to change the active pane and
-Z keeps the window zoomed if it was zoomed.
If -s is omitted and a marked pane is
present (see select-pane
-m), the marked pane is used rather than the
current pane.
swap-window
[-d] [-s
src-window] [-t
dst-window]swapw)link-window, except the source
and destination windows are swapped. It is an error if no window exists at
src-window. If -d is given,
the new window does not become the current window.
If -s is omitted and a marked pane is
present (see select-pane
-m), the window containing the marked pane is
used rather than the current window.
unlink-window
[-k] [-t
target-window]unlinkw)-k is given, a window may be unlinked only if it
is linked to multiple sessions - windows may not be linked to no sessions;
if -k is specified and the window is linked to
only one session, it is unlinked and destroyed.tmux allows a command to be bound to most keys, with or
without a prefix key. When specifying keys, most represent themselves (for
example ‘A’ to
‘Z’). Ctrl keys may be prefixed with
‘C-’ or
‘^’, and Alt (meta) with
‘M-’. In addition, the following special
key names are accepted: Up, Down,
Left, Right, BSpace,
BTab, DC (Delete), End,
Enter, Escape, F1 to
F12, Home, IC (Insert),
NPage/PageDown/PgDn, PPage/PageUp/PgUp,
Space, and Tab. Note that to bind the
‘"’ or
‘'’ keys, quotation marks are necessary,
for example:
bind-key '"' split-window bind-key "'" new-window
A command bound to the Any key will execute for all keys which do not have a more specific binding.
Commands related to key bindings are as follows:
bind-key
[-nr] [-N
note] [-T
key-table] key command
[arguments]bind)c’ is bound to
new-window in the prefix table,
so ‘C-b c’ creates a new window).
The root table is used for keys pressed without the
prefix key: binding ‘c’ to
new-window in the root table
(not recommended) means a plain ‘c’
will create a new window. -n is an alias for
-T root. Keys may also be
bound in custom key tables and the switch-client
-T command used to switch to them from a key
binding. The -r flag indicates this key may
repeat, see the repeat-time option.
-N attaches a note to the key (shown with
list-keys -N).
To view the default bindings and possible commands, see the
list-keys command.
list-keys
[-1aN] [-P
prefix-string -T
key-table] [key]lsk)bind-key commands; -N
lists only keys with attached notes and shows only the key and note for
each key.
With the default form, all key tables are listed by default.
-T lists only keys in
key-table.
With the -N form, only keys in the
root and prefix key tables are
listed by default; -T also lists only keys in
key-table. -P specifies a
prefix to print before each key and -1 lists
only the first matching key. -a lists the
command for keys that do not have a note rather than skipping them.
send-keys
[-FHlMRX] [-N
repeat-count] [-t
target-pane] key
...send)C-a’
or ‘NPage’) to send; if the string
is not recognised as a key, it is sent as a series of characters. All
arguments are sent sequentially from first to last.
The -l flag disables key name lookup
and processes the keys as literal UTF-8 characters. The
-H flag expects each key to be a hexadecimal
number for an ASCII character.
The -R flag causes the terminal state
to be reset.
-M passes through a mouse event (only
valid if bound to a mouse key binding, see
MOUSE SUPPORT).
-X is used to send a command into copy
mode - see the WINDOWS AND
PANES section. -N specifies a repeat count
and -F expands formats in arguments where
appropriate.
send-prefix
[-2] [-t
target-pane]-2 the secondary
prefix key, to a window as if it was pressed.unbind-key
[-an] [-T
key-table] keyunbind)-n and -T are the same as
for bind-key. If -a is
present, all key bindings are removed.tmux may be modified by
changing the value of various options. There are four types of option:
server options, session options
window options and pane options.
The tmux server has a set of global server
options which do not apply to any particular window or session or pane.
These are altered with the set-option
-s command, or displayed with the
show-options -s command.
In addition, each individual session may have a set of session
options, and there is a separate set of global session options. Sessions
which do not have a particular option configured inherit the value from the
global session options. Session options are set or unset with the
set-option command and may be listed with the
show-options command. The available server and
session options are listed under the set-option
command.
Similarly, a set of window options is attached to each window and a set of pane options to each pane. Pane options inherit from window options. This means any pane option may be set as a window option to apply the option to all panes in the window without the option set, for example these commands will set the background colour to red for all panes except pane 0:
set -w window-style bg=red set -pt:.0 window-style bg=blue
There is also a set of global window options from which any unset
window or pane options are inherited. Window and pane options are altered
with set-option -w and
-p commands and displayed with
show-option -w and
-p.
tmux also supports user options which are
prefixed with a ‘@’. User options may
have any name, so long as they are prefixed with
‘@’, and be set to any string. For
example:
$ tmux set -wq @foo "abc123" $ tmux show -wv @foo abc123
Commands which set options are as follows:
set-option
[-aFgopqsuw] [-t
target-pane] option
valueset)-p, a window option with
-w, a server option with
-s, otherwise a session option. If the option is
not a user option, -w or
-s may be unnecessary -
tmux will infer the type from the option name,
assuming -w for pane options. If
-g is given, the global session or window option
is set.
-F expands formats in the option
value. The -u flag unsets an option, so a
session inherits the option from the global options (or with
-g, restores a global option to the
default).
The -o flag prevents setting an option
that is already set and the -q flag suppresses
errors about unknown or ambiguous options.
With -a, and if the option expects a
string or a style, value is appended to the
existing setting. For example:
set -g status-left "foo"
set -ag status-left "bar"
Will result in ‘foobar’.
And:
set -g status-style "bg=red"
set -ag status-style "fg=blue"
Will result in a red background and blue
foreground. Without -a, the result would be the
default background and a blue foreground.
show-options
[-AgHpqsvw] [-t
target-pane] [option]show)-p, the window options with
-w, the server options with
-s, otherwise the session options. If the option
is not a user option, -w or
-s may be unnecessary -
tmux will infer the type from the option name,
assuming -w for pane options. Global session or
window options are listed if -g is used.
-v shows only the option value, not the name. If
-q is set, no error will be returned if
option is unset. -H includes
hooks (omitted by default). -A includes options
inherited from a parent set of options, such options are marked with an
asterisk. value depends on the option and may be a
number, a string, or a flag (on, off, or omitted to toggle).Available server options are:
backspace
keytmux for backspace.buffer-limit
numbercommand-alias[]
name=valueset -s command-alias[100]
zoom='resize-pane -Z'Using:
zoom -t:.1Is equivalent to:
resize-pane -Z -t:.1Note that aliases are expanded when a command is parsed rather
than when it is executed, so binding an alias with
bind-key will bind the expanded form.
default-terminal
terminalTERM environment variable.
For tmux to work correctly, this
must be set to
‘screen’,
‘tmux’ or a derivative of them.copy-command
shell-commandcopy-pipe copy
mode command is used without arguments.escape-time
timetmux waits
after an escape is input to determine if it is part of a function or meta
key sequences. The default is 500 milliseconds.editor
shell-commandtmux runs an
editor.exit-empty
[on | off]exit-unattached
[on | off]extended-keys
[on | off]tmux.focus-events
[on | off]tmux. Attached clients should be detached and
attached again after changing this option.history-file
pathtmux will write
command prompt history on exit and load it from on start.message-limit
numberset-clipboard
[on | external |
off]If set to on,
tmux will both accept the escape sequence to
create a buffer and attempt to set the terminal clipboard. If set to
external, tmux will
attempt to set the terminal clipboard but ignore attempts by
applications to set tmux buffers. If
off, tmux will neither
accept the clipboard escape sequence nor attempt to set the
clipboard.
Note that this feature needs to be enabled in xterm(1) by setting the resource:
disallowedWindowOps: 20,21,SetXprop
Or changing this property from the xterm(1) interactive menu when required.
terminal-features[]
stringtmux has a set of
named terminal features. Each will apply appropriate changes to the
terminfo(5) entry in use.
tmux can detect features for a few
common terminals; this option can be used to easily tell tmux about
features supported by terminals it cannot detect. The
terminal-overrides option allows individual
terminfo(5) capabilities to be set instead,
terminal-features is intended for classes of
functionality supported in a standard way but not reported by
terminfo(5). Care must be taken only to configure this
with features the terminal actually support.
This is an array option where each entry is a colon-separated string made up of a terminal type pattern (matched using fnmatch(3)) followed by a list of terminal features. The available features are:
terminal-overrides[]
stringFor example, to set the
‘clear’
terminfo(5) entry to
‘\e[H\e[2J’ for all terminal types
matching ‘rxvt*’:
rxvt*:clear=\e[H\e[2JThe terminal entry value is passed through strunvis(3) before interpretation.
user-keys[]
keyUser0’,
‘User1’, and so on.
For example:
set -s user-keys[0] "\e[5;30012~"
bind User0 resize-pane -L 3
Available session options are:
activity-action
[any | none |
current | other]monitor-activity is on.
any means activity in any window linked to a
session causes a bell or message (depending on
visual-activity) in the current window of that
session, none means all activity is ignored
(equivalent to monitor-activity being off),
current means only activity in windows other than
the current window are ignored and other means
activity in the current window is ignored but not those in other
windows.assume-paste-time
millisecondstmux key bindings are not processed. The default
is one millisecond and zero disables.base-index
indexbell-action
[any | none |
current | other]monitor-bell
is on. The values are the same as those for
activity-action.default-command
shell-commandtmux to create a login shell using the
value of the default-shell option.default-shell
pathdefault-command option is set to empty,
and must be the full path of the executable. When started
tmux tries to set a default value from the first
suitable of the SHELL environment variable, the
shell returned by getpwuid(3), or
/bin/sh. This option should be configured when
tmux is used as a login shell.default-size
XxYwindow-size option is set to manual or when a
session is created with new-session
-d. The value is the width and height separated by
an ‘x’ character. The default is
80x24.destroy-unattached
[on | off]detach-on-destroy
[on | off]display-panes-active-colour
colourdisplay-panes command
to show the indicator for the active pane.display-panes-colour
colourdisplay-panes command
to show the indicators for inactive panes.display-panes-time
timedisplay-panes command appear.display-time
timehistory-limit
lineskey-table
key-tablelock-after-time
numberlock-session command)
after number seconds of inactivity. The default is
not to lock (set to 0).lock-command
shell-command-np.message-command-style
stylemessage-style
stylemouse
[on | off]tmux captures the mouse and allows mouse
events to be bound as key bindings. See the
MOUSE SUPPORT section for
details.prefix
keyprefix can be set to the special key
‘None’ to set no prefix.prefix2
keyprefix, prefix2 can be set
to ‘None’.renumber-windows
[on | off]base-index option if it has been set. If off, do
not renumber the windows.repeat-time
time-r flag to bind-key.
Repeat is enabled for the default keys bound to the
resize-pane command.set-titles
[on | off]tmux automatically sets these to the
\e]0;...\007 sequence if the terminal appears to be
xterm(1). This option is off by default.set-titles-string
stringset-titles is on. Formats are expanded, see the
FORMATS section.silence-action
[any | none |
current | other]monitor-silence
is on. The values are the same as those for
activity-action.status
[off | on |
2 | 3 |
4 | 5]on gives a status line one row in height;
2, 3,
4 or 5 more rows.status-format[]
formatstatus-interval
intervalstatus-justify
[left | centre |
right]status-keys
[vi | emacs]VISUAL or EDITOR
environment variables are set and contain the string
‘vi’.status-left
stringFor details on how the names and titles can be set see the NAMES AND TITLES section.
Examples are:
#(sysctl vm.loadavg)
#[fg=yellow,bold]#(apm -l)%%#[default] [#S]
The default is ‘[#S]
’.
status-left-length
lengthstatus-left-style
stylestatus-position
[top | bottom]status-right
stringstatus-left,
string will be passed to
strftime(3) and character pairs are replaced.status-right-length
lengthstatus-right-style
stylestatus-style
styleupdate-environment[]
variable-r was given to the
set-environment command).visual-activity
[on | off |
both]monitor-activity window
option is enabled. If set to both, a bell and a message are produced.visual-bell
[on | off |
both]monitor-bell window option is enabled instead of
it being passed through to the terminal (which normally makes a sound). If
set to both, a bell and a message are produced. Also see the
bell-action option.visual-silence
[on | off |
both]monitor-silence is enabled, prints a message
after the interval has expired on a given window instead of sending a
bell. If set to both, a bell and a message are produced.word-separators
string -_@’.Available window options are:
aggressive-resize
[on | off]tmux will resize the window to the size of the
smallest or largest session (see the window-size
option) for which it is the current window, rather than the session to
which it is attached. The window may resize when the current window is
changed on another session; this option is good for full-screen programs
which support SIGWINCH and poor for interactive
programs such as shells.
automatic-rename
[on | off]tmux will rename the window automatically using
the format specified by automatic-rename-format.
This flag is automatically disabled for an individual window when a name
is specified at creation with new-window or
new-session, or later with
rename-window, or with a terminal escape sequence.
It may be switched off globally with:
set-option -wg automatic-rename off
automatic-rename-format
formatautomatic-rename option is enabled.
clock-mode-colour
colourclock-mode-style
[12 | 24]main-pane-height
heightmain-pane-width
widthmain-horizontal or
main-vertical layouts. If suffixed by
‘%’, this is a percentage of the
window size.
copy-mode-match-style
stylecopy-mode-mark-style
stylecopy-mode-current-match-style
stylemode-keys
[vi | emacs]VISUAL or EDITOR
contains ‘vi’.
mode-style
stylemonitor-activity
[on | off]monitor-bell
[on | off]monitor-silence
[interval]interval seconds. Windows that have been silent
for the interval are highlighted in the status line. An interval of zero
disables the monitoring.
other-pane-height
heightmain-horizontal layout. If this option is set to 0
(the default), it will have no effect. If both the
main-pane-height and
other-pane-height options are set, the main pane
will grow taller to make the other panes the specified height, but will
never shrink to do so. If suffixed by
‘%’, this is a percentage of the
window size.
other-pane-width
widthother-pane-height, but set the width of other
panes in the main-vertical layout.
pane-active-border-style
stylepane-base-index
indexbase-index, but set the starting index for
pane numbers.
pane-border-format
formatpane-border-lines
type‘double’ and
‘heavy’ will fall back to standard
ACS line drawing when UTF-8 is not supported.
pane-border-status
[off | top |
bottom]pane-border-style
stylesynchronize-panes
[on | off]window-status-activity-style
stylewindow-status-bell-style
stylewindow-status-current-format
stringwindow-status-current-style
stylewindow-status-format
stringwindow-status-last-style
stylewindow-status-separator
stringwindow-status-style
stylewindow-size
largest | smallest |
manual | latesttmux determines the window size. If
set to largest, the size of the largest attached
session is used; if smallest, the size of the
smallest. If manual, the size of a new window is set
from the default-size option and windows are
resized automatically. With latest,
tmux uses the size of the client that had the most
recent activity. See also the resize-window
command and the aggressive-resize option.
wrap-search
[on | off]Available pane options are:
allow-rename
[on | off]alternate-screen
[on | off]remain-on-exit
[on | off]respawn-pane command.
window-active-style
stylewindow-style
styletmux allows commands to run on various triggers, called
hooks. Most tmux commands have an
after hook and there are a number of hooks not associated
with commands.
Hooks are stored as array options, members of the array are
executed in order when the hook is triggered. Like options different hooks
may be global or belong to a session, window or pane. Hooks may be
configured with the set-hook or
set-option commands and displayed with
show-hooks or show-options
-H. The following two commands are equivalent:
set-hook -g pane-mode-changed[42] 'set -g status-left-style bg=red' set-option -g pane-mode-changed[42] 'set -g status-left-style bg=red'
Setting a hook without specifying an array index clears the hook and sets the first member of the array.
A command's after hook is run after it completes, except when the
command is run as part of a hook itself. They are named with an
‘after-’ prefix. For example, the
following command adds a hook to select the even-vertical layout after every
split-window:
set-hook -g after-split-window "selectl even-vertical"
All the notifications listed in the
CONTROL MODE section are hooks
(without any arguments), except %exit. The following
additional hooks are available:
monitor-activity.monitor-bell.monitor-silence.remain-on-exit is on so the pane has not
closed.focus-events option is on.focus-events option is on.Hooks are managed with these commands:
set-hook
[-agpRuw] [-t
target-pane] hook-name
command-R, sets (or with
-u unsets) hook hook-name to
command. The flags are the same as for
set-option.
With -R, run
hook-name immediately.
show-hooks
[-gpw] [-t
target-pane]show-options.mouse option is on (the default is off),
tmux allows mouse events to be bound as keys. The name
of each key is made up of a mouse event (such as
‘MouseUp1’) and a location suffix, one
of the following:
Pane |
the contents of a pane |
Border |
a pane border |
Status |
the status line window list |
StatusLeft |
the left part of the status line |
StatusRight |
the right part of the status line |
StatusDefault |
any other part of the status line |
The following mouse events are available:
WheelUp |
WheelDown | ||
MouseDown1 |
MouseUp1 | MouseDrag1 | MouseDragEnd1 |
MouseDown2 |
MouseUp2 | MouseDrag2 | MouseDragEnd2 |
MouseDown3 |
MouseUp3 | MouseDrag3 | MouseDragEnd3 |
SecondClick1 |
SecondClick2 | SecondClick3 | |
DoubleClick1 |
DoubleClick2 | DoubleClick3 | |
TripleClick1 |
TripleClick2 | TripleClick3 |
The ‘SecondClick’ events are
fired for the second click of a double click, even if there may be a third
click which will fire ‘TripleClick’
instead of ‘DoubleClick’.
Each should be suffixed with a location, for example
‘MouseDown1Status’.
The special token ‘{mouse}’
or ‘=’ may be used as
target-window or target-pane in
commands bound to mouse key bindings. It resolves to the window or pane over
which the mouse event took place (for example, the window in the status line
over which button 1 was released for a
‘MouseUp1Status’ binding, or the pane
over which the wheel was scrolled for a
‘WheelDownPane’ binding).
The send-keys -M
flag may be used to forward a mouse event to a pane.
The default key bindings allow the mouse to be used to select and
resize panes, to copy text and to change window using the status line. These
take effect if the mouse option is turned on.
-F flag with a
format argument. This is a string which controls the
output format of the command. Format variables are enclosed in
‘#{’ and
‘}’, for example
‘#{session_name}’. The possible
variables are listed in the table below, or the name of a
tmux option may be used for an option's value. Some
variables have a shorter alias such as
‘#S’;
‘##’ is replaced by a single
‘#’,
‘#,’ by a
‘,’ and
‘#}’ by a
‘}’.
Conditionals are available by prefixing with
‘?’ and separating two alternatives
with a comma; if the specified variable exists and is not zero, the first
alternative is chosen, otherwise the second is used. For example
‘#{?session_attached,attached,not
attached}’ will include the string
‘attached’ if the session is attached
and the string ‘not attached’ if it is
unattached, or
‘#{?automatic-rename,yes,no}’ will
include ‘yes’ if
automatic-rename is enabled, or
‘no’ if not. Conditionals can be
nested arbitrarily. Inside a conditional,
‘,’ and
‘}’ must be escaped as
‘#,’ and
‘#}’, unless they are part of a
‘#{...}’ replacement. For example:
#{?pane_in_mode,#[fg=white#,bg=red],#[fg=red#,bg=white]}#W .
String comparisons may be expressed by prefixing two
comma-separated alternatives by ‘==’,
‘!=’,
‘<’,
‘>’,
‘<=’ or
‘>=’ and a colon. For example
‘#{==:#{host},myhost}’ will be
replaced by ‘1’ if running on
‘myhost’, otherwise by
‘0’.
‘||’ and
‘&&’ evaluate to true if
either or both of two comma-separated alternatives are true, for example
‘#{||:#{pane_in_mode},#{alternate_on}}’.
An ‘m’ specifies an
fnmatch(3) or regular expression comparison. The first
argument is the pattern and the second the string to compare. An optional
argument specifies flags: ‘r’ means
the pattern is a regular expression instead of the default
fnmatch(3) pattern, and
‘i’ means to ignore case. For example:
‘#{m:*foo*,#{host}}’ or
‘#{m/ri:^A,MYVAR}’. A
‘C’ performs a search for an
fnmatch(3) pattern or regular expression in the pane
content and evaluates to zero if not found, or a line number if found. Like
‘m’, an
‘r’ flag means search for a regular
expression and ‘i’ ignores case. For
example: ‘#{C/r:^Start}’
Numeric operators may be performed by prefixing two
comma-separated alternatives with an
‘e’ and an operator. An optional
‘f’ flag may be given after the
operator to use floating point numbers, otherwise integers are used. This
may be followed by a number giving the number of decimal places to use for
the result. The available operators are: addition
‘+’, subtraction
‘-’, multiplication
‘*’, division
‘/’, and modulus
‘m’ or
‘%’ (note that
‘%’ must be escaped as
‘%%’ in formats which are also
expanded by strftime(3)). For example,
‘#{e|*|f|4:5.5,3}’ multiplies 5.5 by 3
for a result with four decimal places and
‘#{e|%%:7,3}’ returns the modulus of 7
and 3.
A limit may be placed on the length of the resultant string by
prefixing it by an ‘=’, a number and a
colon. Positive numbers count from the start of the string and negative from
the end, so ‘#{=5:pane_title}’ will
include at most the first five characters of the pane title, or
‘#{=-5:pane_title}’ the last five
characters. A suffix or prefix may be given as a second argument - if
provided then it is appended or prepended to the string if the length has
been trimmed, for example
‘#{=/5/...:pane_title}’ will append
‘...’ if the pane title is more than
five characters. Similarly, ‘p’ pads
the string to a given width, for example
‘#{p10:pane_title}’ will result in a
width of at least 10 characters. A positive width pads on the left, a
negative on the right.
Prefixing a time variable with
‘t:’ will convert it to a string, so
if ‘#{window_activity}’ gives
‘1445765102’,
‘#{t:window_activity}’ gives
‘Sun Oct 25 09:25:02 2015’. Adding
‘p (’
‘`t/p`’) will use shorter but less
accurate time format for times in the past. A custom format may be given
using an ‘f’ suffix (note that
‘%’ must be escaped as
‘%%’ if the format is separately being
passed through strftime(3), for example in the
status-left option):
‘#{t/f/%%H#:%%M:window_activity}’, see
strftime(3).
The ‘b:’ and
‘d:’ prefixes are
basename(3) and dirname(3) of the
variable respectively. ‘q:’ will
escape sh(1) special characters.
‘E:’ will expand the format twice, for
example ‘#{E:status-left}’ is the
result of expanding the content of the status-left
option rather than the option itself.
‘T:’ is like
‘E:’ but also expands
strftime(3) specifiers.
‘S:’,
‘W:’ or
‘P:’ will loop over each session,
window or pane and insert the format once for each. For windows and panes,
two comma-separated formats may be given: the second is used for the current
window or active pane. For example, to get a list of windows formatted like
the status line:
#{W:#{E:window-status-format} ,#{E:window-status-current-format} }
A prefix of the form
‘s/foo/bar/:’ will substitute
‘foo’ with
‘bar’ throughout. The first argument
may be an extended regular expression and a final argument may be
‘i’ to ignore case, for example
‘s/a(.)/\1x/i:’ would change
‘abABab’ into
‘bxBxbx’.
In addition, the last line of a shell command's output may be
inserted using ‘#()’. For example,
‘#(uptime)’ will insert the system's
uptime. When constructing formats, tmux does not
wait for ‘#()’ commands to finish;
instead, the previous result from running the same command is used, or a
placeholder if the command has not been run before. If the command hasn't
exited, the most recent line of output will be used, but the status line
will not be updated more than once a second. Commands are executed with the
tmux global environment set (see the
GLOBAL AND SESSION
ENVIRONMENT section).
An ‘l’ specifies that a
string should be interpreted literally and not expanded. For example
‘#{l:#{?pane_in_mode,yes,no}}’ will be
replaced by
‘#{?pane_in_mode,yes,no}’.
The following variables are available, where appropriate:
| Variable name | Alias | Replaced with |
alternate_on |
1 if pane is in alternate screen | |
alternate_saved_x |
Saved cursor X in alternate screen | |
alternate_saved_y |
Saved cursor Y in alternate screen | |
buffer_created |
Time buffer created | |
buffer_name |
Name of buffer | |
buffer_sample |
Sample of start of buffer | |
buffer_size |
Size of the specified buffer in bytes | |
client_activity |
Time client last had activity | |
client_cell_height |
Height of each client cell in pixels | |
client_cell_width |
Width of each client cell in pixels | |
client_control_mode |
1 if client is in control mode | |
client_created |
Time client created | |
client_discarded |
Bytes discarded when client behind | |
client_flags |
List of client flags | |
client_height |
Height of client | |
client_key_table |
Current key table | |
client_last_session |
Name of the client's last session | |
client_name |
Name of client | |
client_pid |
PID of client process | |
client_prefix |
1 if prefix key has been pressed | |
client_readonly |
1 if client is readonly | |
client_session |
Name of the client's session | |
client_termname |
Terminal name of client | |
client_termtype |
Terminal type of client, if available | |
client_termfeatures |
Terminal features of client, if any | |
client_tty |
Pseudo terminal of client | |
client_utf8 |
1 if client supports UTF-8 | |
client_width |
Width of client | |
client_written |
Bytes written to client | |
command |
Name of command in use, if any | |
command_list_alias |
Command alias if listing commands | |
command_list_name |
Command name if listing commands | |
command_list_usage |
Command usage if listing commands | |
copy_cursor_line |
Line the cursor is on in copy mode | |
copy_cursor_word |
Word under cursor in copy mode | |
copy_cursor_x |
Cursor X position in copy mode | |
copy_cursor_y |
Cursor Y position in copy mode | |
cursor_character |
Character at cursor in pane | |
cursor_flag |
Pane cursor flag | |
cursor_x |
Cursor X position in pane | |
cursor_y |
Cursor Y position in pane | |
history_bytes |
Number of bytes in window history | |
history_limit |
Maximum window history lines | |
history_size |
Size of history in lines | |
hook |
Name of running hook, if any | |
hook_pane |
ID of pane where hook was run, if any | |
hook_session |
ID of session where hook was run, if any | |
hook_session_name |
Name of session where hook was run, if any | |
hook_window |
ID of window where hook was run, if any | |
hook_window_name |
Name of window where hook was run, if any | |
host |
#H | Hostname of local host |
host_short |
#h | Hostname of local host (no domain name) |
insert_flag |
Pane insert flag | |
keypad_cursor_flag |
Pane keypad cursor flag | |
keypad_flag |
Pane keypad flag | |
line |
Line number in the list | |
mouse_all_flag |
Pane mouse all flag | |
mouse_any_flag |
Pane mouse any flag | |
mouse_button_flag |
Pane mouse button flag | |
mouse_line |
Line under mouse, if any | |
mouse_sgr_flag |
Pane mouse SGR flag | |
mouse_standard_flag |
Pane mouse standard flag | |
mouse_utf8_flag |
Pane mouse UTF-8 flag | |
mouse_word |
Word under mouse, if any | |
mouse_x |
Mouse X position, if any | |
mouse_y |
Mouse Y position, if any | |
origin_flag |
Pane origin flag | |
pane_active |
1 if active pane | |
pane_at_bottom |
1 if pane is at the bottom of window | |
pane_at_left |
1 if pane is at the left of window | |
pane_at_right |
1 if pane is at the right of window | |
pane_at_top |
1 if pane is at the top of window | |
pane_bottom |
Bottom of pane | |
pane_current_command |
Current command if available | |
pane_current_path |
Current path if available | |
pane_dead |
1 if pane is dead | |
pane_dead_status |
Exit status of process in dead pane | |
pane_format |
1 if format is for a pane | |
pane_height |
Height of pane | |
pane_id |
#D | Unique pane ID |
pane_in_mode |
1 if pane is in a mode | |
pane_index |
#P | Index of pane |
pane_input_off |
1 if input to pane is disabled | |
pane_left |
Left of pane | |
pane_marked |
1 if this is the marked pane | |
pane_marked_set |
1 if a marked pane is set | |
pane_mode |
Name of pane mode, if any | |
pane_path |
Path of pane (can be set by application) | |
pane_pid |
PID of first process in pane | |
pane_pipe |
1 if pane is being piped | |
pane_right |
Right of pane | |
pane_search_string |
Last search string in copy mode | |
pane_skipped |
Bytes skipped as not visible in pane | |
pane_start_command |
Command pane started with | |
pane_synchronized |
1 if pane is synchronized | |
pane_tabs |
Pane tab positions | |
pane_title |
#T | Title of pane (can be set by application) |
pane_top |
Top of pane | |
pane_tty |
Pseudo terminal of pane | |
pane_width |
Width of pane | |
pane_written |
Bytes written by pane (aside from redrawing) | |
pid |
Server PID | |
popup_key |
Key pressed in popup | |
popup_mouse_x |
Mouse X position in popup | |
popup_mouse_y |
Mouse Y position in popup | |
rectangle_toggle |
1 if rectangle selection is activated | |
scroll_position |
Scroll position in copy mode | |
scroll_region_lower |
Bottom of scroll region in pane | |
scroll_region_upper |
Top of scroll region in pane | |
search_present |
1 if search started in copy mode | |
search_match |
Search match if any | |
selection_active |
1 if selection started and changes with the cursor in copy mode | |
selection_end_x |
X position of the end of the selection | |
selection_end_y |
Y position of the end of the selection | |
selection_present |
1 if selection started in copy mode | |
selection_start_x |
X position of the start of the selection | |
selection_start_y |
Y position of the start of the selection | |
session_activity |
Time of session last activity | |
session_alerts |
List of window indexes with alerts | |
session_attached |
Number of clients session is attached to | |
session_attached_list |
List of clients session is attached to | |
session_created |
Time session created | |
session_format |
1 if format is for a session | |
session_group |
Name of session group | |
session_group_attached |
Number of clients sessions in group are attached to | |
session_group_attached_list |
List of clients sessions in group are attached to | |
session_group_list |
List of sessions in group | |
session_group_many_attached |
1 if multiple clients attached to sessions in group | |
session_group_size |
Size of session group | |
session_grouped |
1 if session in a group | |
session_id |
Unique session ID | |
session_last_attached |
Time session last attached | |
session_many_attached |
1 if multiple clients attached | |
session_marked |
1 if this session contains the marked pane | |
session_name |
#S | Name of session |
session_path |
Working directory of session | |
session_stack |
Window indexes in most recent order | |
session_windows |
Number of windows in session | |
socket_path |
Server socket path | |
start_time |
Server start time | |
version |
Server version | |
window_active |
1 if window active | |
window_active_clients |
Number of clients viewing this window | |
window_active_clients_list |
List of clients viewing this window | |
window_active_sessions |
Number of sessions on which this window is active | |
window_active_sessions_list |
List of sessions on which this window is active | |
window_activity |
Time of window last activity | |
window_activity_flag |
1 if window has activity | |
window_bell_flag |
1 if window has bell | |
window_bigger |
1 if window is larger than client | |
window_cell_height |
Height of each cell in pixels | |
window_cell_width |
Width of each cell in pixels | |
window_end_flag |
1 if window has the highest index | |
window_flags |
#F | Window flags |
window_format |
1 if format is for a window | |
window_height |
Height of window | |
window_id |
Unique window ID | |
window_index |
#I | Index of window |
window_last_flag |
1 if window is the last used | |
window_layout |
Window layout description, ignoring zoomed window panes | |
window_linked |
1 if window is linked across sessions | |
window_linked_sessions |
Number of sessions this window is linked to | |
window_linked_sessions_list |
List of sessions this window is linked to | |
window_marked_flag |
1 if window contains the marked pane | |
window_name |
#W | Name of window |
window_offset_x |
X offset into window if larger than client | |
window_offset_y |
Y offset into window if larger than client | |
window_panes |
Number of panes in window | |
window_silence_flag |
1 if window has silence alert | |
window_stack_index |
Index in session most recent stack | |
window_start_flag |
1 if window has the lowest index | |
window_visible_layout |
Window layout description, respecting zoomed window panes | |
window_width |
Width of window | |
window_zoomed_flag |
1 if window is zoomed | |
wrap_flag |
Pane wrap flag |
tmux offers various options to specify the colour and
attributes of aspects of the interface, for example
status-style for the status line. In addition,
embedded styles may be specified in format options, such as
status-left, by enclosing them in
‘#[’ and
‘]’.
A style may be the single term
‘default’ to specify the default style
(which may come from an option, for example
status-style in the status line) or a space or comma
separated list of the following:
fg=colourblack, red,
green, yellow,
blue, magenta,
cyan, white; if supported
the bright variants brightred,
brightgreen, brightyellow;
colour0 to colour255 from
the 256-colour set; default for the default
colour; terminal for the terminal default colour;
or a hexadecimal RGB string such as
‘#ffffff’.bg=colournoneacs,
bright (or bold),
dim, underscore,
blink, reverse,
hidden, italics,
overline, strikethrough,
double-underscore,
curly-underscore,
dotted-underscore,
dashed-underscoreno’ to unset.
acs is the terminal alternate character set.align=left
(or noalign), align=centre,
align=rightfill=colourlist=on,
list=focus,
list=left-marker,
list=right-marker,
noliststatus-format option:
list=on marks the start of the list;
list=focus is the part of the list that should be
kept in focus if the entire list won't fit in the available space
(typically the current window); list=left-marker
and list=right-marker mark the text to be used to
mark that text has been trimmed from the left or right of the list if
there is not enough space.push-default,
pop-defaultpush-default affects any
subsequent use of the default term until a
pop-default. Only one default may be pushed (each
push-default replaces the previous saved
default).range=left,
range=right, range=window|X,
norangestatus-format option.
range=left and range=right
are the text used for the
‘StatusLeft’ and
‘StatusRight’ mouse keys.
range=window|X is the range for a window passed to
the ‘Status’ mouse key, where
‘X’ is a window index.Examples are:
fg=yellow bold underscore blink bg=black,fg=default,noreverse
tmux distinguishes between names and titles. Windows and
sessions have names, which may be used to specify them in targets and are
displayed in the status line and various lists: the name is the
tmux identifier for a window or session. Only panes
have titles. A pane's title is typically set by the program running inside the
pane using an escape sequence (like it would set the
xterm(1) window title in X(7)). Windows
themselves do not have titles - a window's title is the title of its active
pane. tmux itself may set the title of the terminal in
which the client is running, see the set-titles
option.
A session's name is set with the
new-session and
rename-session commands. A window's name is set with
one of:
-n for
new-window or
new-session).allow-rename option is
turned on):
$ printf '\033kWINDOW_NAME\033\\'
automatic-rename
option.When a pane is first created, its title is the hostname. A pane's title can be set via the title setting escape sequence, for example:
$ printf '\033]2;My Title\033\\'
It can also be modified with the
select-pane -T command.
tmux copies the environment
into the global environment; in addition, each session has a
session environment. When a window is created, the session
and global environments are merged. If a variable exists in both, the value
from the session environment is used. The result is the initial environment
passed to the new process.
The update-environment session option may
be used to update the session environment from the client when a new session
is created or an old reattached. tmux also
initialises the TMUX variable with some internal
information to allow commands to be executed from inside, and the
TERM variable with the correct terminal setting of
‘screen’.
Variables in both session and global environments may be marked as hidden. Hidden variables are not passed into the environment of new processes and instead can only be used by tmux itself (for example in formats, see the FORMATS section).
Commands to alter and view the environment are:
set-environment
[-hgru] [-t
target-session] name
[value]setenv)-g is used,
the change is made in the global environment; otherwise, it is applied to
the session environment for target-session. The
-u flag unsets a variable.
-r indicates the variable is to be removed from
the environment before starting a new process. -h
marks the variable as hidden.show-environment
[-hgs] [-t
target-session] [variable]showenv)-g. If
variable is omitted, all variables are shown.
Variables removed from the environment are prefixed with
‘-’. If -s
is used, the output is formatted as a set of Bourne shell commands.
-h shows hidden variables (omitted by
default).tmux includes an optional status line which is displayed
in the bottom line of each terminal.
By default, the status line is enabled and one line in height (it
may be disabled or made multiple lines with the
status session option) and contains, from
left-to-right: the name of the current session in square brackets; the
window list; the title of the active pane in double quotes; and the time and
date.
Each line of the status line is configured with the
status-format option. The default is made of three
parts: configurable left and right sections (which may contain dynamic
content such as the time or output from a shell command, see the
status-left,
status-left-length,
status-right, and
status-right-length options below), and a central
window list. By default, the window list shows the index, name and (if any)
flag of the windows present in the current session in ascending numerical
order. It may be customised with the
window-status-format and
window-status-current-format options. The flag is one
of the following symbols appended to the window name:
| Symbol | Meaning |
* |
Denotes the current window. |
- |
Marks the last window (previously selected). |
# |
Window activity is monitored and activity has been detected. |
! |
Window bells are monitored and a bell has occurred in the window. |
~ |
The window has been silent for the monitor-silence interval. |
M |
The window contains the marked pane. |
Z |
The window's active pane is zoomed. |
The # symbol relates to the
monitor-activity window option. The window name is
printed in inverted colours if an alert (bell, activity or silence) is
present.
The colour and attributes of the status line may be configured,
the entire status line using the status-style
session option and individual windows using the
window-status-style window option.
The status line is automatically refreshed at interval if it has
changed, the interval may be controlled with the
status-interval session option.
Commands related to the status line are as follows:
command-prompt
[-1ikNTW] [-I
inputs] [-p
prompts] [-t
target-client] [template]tmux to execute commands interactively.
If template is specified, it is used as
the command. If present, -I is a comma-separated
list of the initial text for each prompt. If -p
is given, prompts is a comma-separated list of
prompts which are displayed in order; otherwise a single prompt is
displayed, constructed from template if it is
present, or ‘:’ if not.
Before the command is executed, the first occurrence of the
string ‘%%’ and all occurrences of
‘%1’ are replaced by the response
to the first prompt, all ‘%2’ are
replaced with the response to the second prompt, and so on for further
prompts. Up to nine prompt responses may be replaced
(‘%1’ to
‘%9’).
‘%%%’ is like
‘%%’ but any quotation marks are
escaped.
-1 makes the prompt only accept one
key press, in this case the resulting input is a single character.
-k is like -1 but the
key press is translated to a key name. -N makes
the prompt only accept numeric key presses. -i
executes the command every time the prompt input changes instead of when
the user exits the command prompt. -T tells
tmux that the prompt is for a target which
affects what completions are offered when Tab is
pressed; -W is similar but indicates the prompt
is for a window.
The following keys have a special meaning in the command
prompt, depending on the value of the
status-keys option:
| Function | vi | emacs |
Cancel
command prompt |
q | Escape |
Delete
from cursor to start of word |
C-w | |
Delete
entire command |
d | C-u |
Delete
from cursor to end |
D | C-k |
Execute
command |
Enter | Enter |
Get
next command from history |
Down | |
Get
previous command from history |
Up | |
Insert
top paste buffer |
p | C-y |
Look
for completions |
Tab | Tab |
Move
cursor left |
h | Left |
Move
cursor right |
l | Right |
Move
cursor to end |
$ | C-e |
Move
cursor to next word |
w | M-f |
Move
cursor to previous word |
b | M-b |
Move
cursor to start |
0 | C-a |
Transpose
characters |
C-t |
confirm-before
[-p prompt]
[-t target-client]
commandconfirm)-p is given, prompt is the
prompt to display; otherwise a prompt is constructed from
command. It may contain the special character
sequences supported by the status-left option.
This command works only from inside
tmux.
display-menu
[-c target-client]
[-t target-pane]
[-T title]
[-x position]
[-y position]
name key
command ...menu)A menu is passed as a series of arguments: first the menu item name, second the key shortcut (or empty for none) and third the command to run when the menu item is chosen. The name and command are formats, see the FORMATS and STYLES sections. If the name begins with a hyphen (-), then the item is disabled (shown dim) and may not be chosen. The name may be empty for a separator line, in which case both the key and command should be omitted.
-T is a format for the menu title (see
FORMATS).
-x and -y give
the position of the menu. Both may be a row or column number, or one of
the following special values:
| Value | Flag | Meaning |
C |
Both | The centre of the terminal |
R |
-x |
The right side of the terminal |
P |
Both | The bottom left of the pane |
M |
Both | The mouse position |
W |
Both | The window position on the status line |
S |
-y |
The line above or below the status line |
Each menu consists of items followed by a key shortcut shown in brackets. If the menu is too large to fit on the terminal, it is not displayed. Pressing the key shortcut chooses the corresponding item. If the mouse is enabled and the menu is opened from a mouse key binding, releasing the mouse button with an item selected will choose that item. The following keys are also available:
| Key | Function |
Enter |
Choose selected item |
Up |
Select previous item |
Down |
Select next item |
q |
Exit menu |
display-message
[-aIpv] [-c
target-client] [-t
target-pane] [message]display)-p is given, the output is
printed to stdout, otherwise it is displayed in the
target-client status line. The format of
message is described in the
FORMATS section; information is taken
from target-pane if -t is
given, otherwise the active pane.
-v prints verbose logging as the
format is parsed and -a lists the format
variables and their values.
-I forwards any input read from stdin
to the empty pane given by target-pane.
display-popup
[-CEK] [-c
target-client] [-d
start-directory] [-h
height] [-R
shell-command] [-t
target-pane] [-w
width] [-x
position] [-y
position] [command
line ...]popup)-R which is run and
any output shown in the pane.The first argument, command, is a
tmux command which is run when a key is pressed.
The key is available in the
‘popup_key’ format. After
command is run, the popup is closed. It may be
empty to discard any key presses. If -K is given
together with -R, key presses are instead passed
to the -R shell command.
-E closes the popup automatically when
shell-command exits. Two
-E closes the popup only if
shell-command exited with success. With
-K,
‘Escape’ and
‘C-c’ close the popup unless
-E is also given.
-x and -y give
the position of the popup, they have the same meaning as for the
display-menu command. -w
and -h give the width and height - both may be a
percentage (followed by ‘%’). If
omitted, without -R they are calculated from the
given lines and with -R they use half the
terminal size.
The -C flag closes any popup on the
client.
tmux maintains a set of named paste
buffers. Each buffer may be either explicitly or automatically named.
Explicitly named buffers are named when created with the
set-buffer or load-buffer
commands, or by renaming an automatically named buffer with
set-buffer -n. Automatically
named buffers are given a name such as
‘buffer0001’,
‘buffer0002’ and so on. When the
buffer-limit option is reached, the oldest
automatically named buffer is deleted. Explicitly named buffers are not
subject to buffer-limit and may be deleted with the
delete-buffer command.
Buffers may be added using copy-mode or
the set-buffer and
load-buffer commands, and pasted into a window using
the paste-buffer command. If a buffer command is
used and no buffer is specified, the most recently added automatically named
buffer is assumed.
A configurable history buffer is also maintained for each window.
By default, up to 2000 lines are kept; this can be altered with the
history-limit option (see the
set-option command above).
The buffer commands are as follows:
choose-buffer
[-NZr] [-F
format] [-f
filter] [-O
sort-order] [-t
target-pane] [template]-Z zooms the pane. The following keys
may be used in buffer mode:
| Key | Function |
Enter |
Paste selected buffer |
Up |
Select previous buffer |
Down |
Select next buffer |
C-s |
Search by name or content |
n |
Repeat last search |
t |
Toggle if buffer is tagged |
T |
Tag no buffers |
C-t |
Tag all buffers |
p |
Paste selected buffer |
P |
Paste tagged buffers |
d |
Delete selected buffer |
D |
Delete tagged buffers |
e |
Open the buffer in an editor |
f |
Enter a format to filter items |
O |
Change sort field |
r |
Reverse sort order |
v |
Toggle preview |
q |
Exit mode |
After a buffer is chosen,
‘%%’ is replaced by the buffer
name in template and the result executed as a
command. If template is not given,
"paste-buffer -b '%%'" is used.
-O specifies the initial sort field:
one of ‘time’,
‘name’ or
‘size’. -r
reverses the sort order. -f specifies an initial
filter: the filter is a format - if it evaluates to zero, the item in
the list is not shown, otherwise it is shown. If a filter would lead to
an empty list, it is ignored. -F specifies the
format for each item in the list. -N starts
without the preview. This command works only if at least one client is
attached.
clear-history
[-t target-pane]clearhist)delete-buffer
[-b buffer-name]deleteb)list-buffers
[-F format]
[-f filter]lsb)-F specifies the format of
each line and -f a filter. Only buffers for which
the filter is true are shown. See the
FORMATS section.load-buffer
[-b buffer-name]
pathloadb)paste-buffer
[-dpr] [-b
buffer-name] [-s
separator] [-t
target-pane]pasteb)-d,
also delete the paste buffer. When output, any linefeed (LF) characters in
the paste buffer are replaced with a separator, by default carriage return
(CR). A custom separator may be specified using the
-s flag. The -r flag means
to do no replacement (equivalent to a separator of LF). If
-p is specified, paste bracket control codes are
inserted around the buffer if the application has requested bracketed
paste mode.save-buffer
[-a] [-b
buffer-name] pathsaveb)-a option appends
to rather than overwriting the file.set-buffer
[-a] [-b
buffer-name] [-n
new-buffer-name] datasetb)-a option appends to rather than overwriting the
buffer. The -n option renames the buffer to
new-buffer-name.show-buffer
[-b buffer-name]showb)clock-mode
[-t target-pane]if-shell
[-bF] [-t
target-pane] shell-command
command [command]if)-b, shell-command is run in
the background.
If -F is given,
shell-command is not executed but considered
success if neither empty nor zero (after formats are expanded).
lock-serverlock)lock-command option.run-shell
[-b] [-d
delay] [-t
target-pane]
[shell-command]run)-b, the command is run in the
background. -d waits for
delay seconds before starting the command. After the
command finishes, any output to stdout is displayed in view mode (in the
pane specified by -t or the current pane if
omitted). If the command doesn't return success, the exit status is also
displayed.wait-for
[-L | -S |
-U] channelwait)wait-for -S with the
same channel. When -L is used, the channel is
locked and any clients that try to lock the same channel are made to wait
until the channel is unlocked with wait-for
-U.tmux client detaches, it prints a message. This
may be one of:
SIGHUP signal (for example with
detach-client -P).SIGTERM.tmux.SIGTERM.tmux understands some unofficial extensions to
terminfo(5). It is not normally necessary to set these
manually, instead the terminal-features option should
be used.
tmux the terminal
supports default colours.tmux:
$ printf '\033]12;red\033\\'
$ printf '\033[4 q'
If Se is not set, Ss with argument 0 will be used to reset the cursor style instead.
direct
colour’ RGB escape sequence (for example,
\e[38;2;255;255;255m).
If supported, this is used for the initialize colour escape
sequence (which may be enabled by adding the
‘initc’ and
‘ccc’ capabilities to the
tmux terminfo(5) entry).
This is equivalent to the RGB terminfo(5) capability.
tmux offers a textual interface called
control mode. This allows applications to communicate with
tmux using a simple text-only protocol.
In control mode, a client sends tmux
commands or command sequences terminated by newlines on standard input. Each
command will produce one block of output on standard output. An output block
consists of a %begin line followed by the output (which
may be empty). The output block ends with a %end or
%error. %begin and matching
%end or %error have two arguments: an
integer time (as seconds from epoch) and command number. For example:
%begin 1363006971 2 0: ksh* (1 panes) [80x24] [layout b25f,80x24,0,0,2] @2 (active) %end 1363006971 2
The refresh-client
-C command may be used to set the size of a client
in control mode.
In control mode, tmux outputs
notifications. A notification will never occur inside an output block.
The following notifications are defined:
%client-session-changed
client session-id name%continue
pane-idrefresh-client -A).%exit
[reason]tmux client is exiting immediately, either
because it is not attached to any session or an error occurred. If
present, reason describes why the client
exited.%extended-output
pane-id age ...
: value%output sent when the
pause-after flag is set. age
is the time in milliseconds for which tmux had buffered the output before
it was sent. Any subsequent arguments up until a single
‘:’ are for future use and should be
ignored.%layout-change
window-id window-layout
window-visible-layout
window-flags%output
pane-id value%pane-mode-changed
pane-id%pause
pane-id%session-changed
session-id name%session-renamed
name%session-window-changed
session-id window-id%sessions-changed%subscription-changed
name session-id
window-id window-index
pane-id ... : valuerefresh-client -B. Any
arguments after pane-id up until a single
‘:’ are for future use and should be
ignored.%unlinked-window-add
window-id%window-add
window-id%window-close
window-id%window-pane-changed
window-id pane-id%window-renamed
window-id nametmux is started, it inspects the following
environment variables:
EDITORvi’ and
VISUAL is unset, use vi-style key bindings.
Overridden by the mode-keys and
status-keys options.HOMELC_CTYPE-u option is given or if
LC_CTYPE contains “UTF-8” or
“UTF8”. Otherwise, only ASCII characters are written and
non-ASCII characters are replaced with underscores
(‘_’). For input,
tmux always runs with a UTF-8 locale. If
en_US.UTF-8 is provided by the operating system it is used and
LC_CTYPE is ignored for input. Otherwise,
LC_CTYPE tells tmux what
the UTF-8 locale is called on the current system. If the locale specified
by LC_CTYPE is not available or is not a UTF-8
locale, tmux exits with an error message.LC_TIMEPWDSHELLdefault-shell option for details.TMUX_TMPDIR-L option for details.VISUALvi’, use vi-style key bindings.
Overridden by the mode-keys and
status-keys options.tmux configuration file.tmux session running
vi(1):
$ tmux new-session viMost commands have a shorter form, known as an alias. For
new-session, this is new:
$ tmux new viAlternatively, the shortest unambiguous form of a command is accepted. If there are several options, they are listed:
$ tmux n ambiguous command: n, could be: new-session, new-window, next-window
Within an active session, a new window may be created by typing
‘C-b c’ (Ctrl followed by the
‘b’ key followed by the
‘c’ key).
Windows may be navigated with: ‘C-b
0’ (to select window 0), ‘C-b
1’ (to select window 1), and so on;
‘C-b n’ to select the next window; and
‘C-b p’ to select the previous
window.
A session may be detached using ‘C-b
d’ (or by an external event such as ssh(1)
disconnection) and reattached with:
$ tmux attach-sessionTyping ‘C-b ?’ lists the
current key bindings in the current window; up and down may be used to
navigate the list or ‘q’ to exit from
it.
Commands to be run when the tmux server is
started may be placed in the ~/.tmux.conf
configuration file. Common examples include:
Changing the default prefix key:
set-option -g prefix C-a unbind-key C-b bind-key C-a send-prefix
Turning the status line off, or changing its colour:
set-option -g status off set-option -g status-style bg=blue
Setting other options, such as the default command, or locking after 30 minutes of inactivity:
set-option -g default-command "exec /bin/ksh" set-option -g lock-after-time 1800
Creating new key bindings:
bind-key b set-option status bind-key / command-prompt "split-window 'exec man %%'" bind-key S command-prompt "new-window -n %1 'ssh %1'"
| November 30, 2024 | BSD |