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| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
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| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
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| General Public License for more details. |
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| |
| <refentry id="systemd-install"> |
| |
| <refentryinfo> |
| <title>systemctl</title> |
| <productname>systemd</productname> |
| |
| <authorgroup> |
| <author> |
| <contrib>Developer</contrib> |
| <firstname>Lennart</firstname> |
| <surname>Poettering</surname> |
| <email>lennart@poettering.net</email> |
| </author> |
| </authorgroup> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>systemctl</refentrytitle> |
| <manvolnum>1</manvolnum> |
| </refmeta> |
| |
| <refnamediv> |
| <refname>systemctl</refname> |
| <refpurpose>Control the systemd system and session manager</refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv> |
| <cmdsynopsis> |
| <command>systemctl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg> <arg choice="opt" rep="repeat">NAME</arg></command> |
| </cmdsynopsis> |
| </refsynopsisdiv> |
| |
| <refsect1> |
| <title>Description</title> |
| |
| <para><command>systemctl</command> may be used to |
| introspect and control the state of the |
| <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
| system and session manager.</para> |
| </refsect1> |
| |
| <refsect1> |
| <title>Options</title> |
| |
| <para>The following options are understood:</para> |
| |
| <variablelist> |
| <varlistentry> |
| <term><option>--help</option></term> |
| <term><option>-h</option></term> |
| |
| <listitem><para>Prints a short help |
| text and exits.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--type=</option></term> |
| <term><option>-t</option></term> |
| |
| <listitem><para>When listing units, |
| limit display to certain unit |
| types. If not specified units of all |
| types will be shown. The argument |
| should be a unit type name such as |
| <option>service</option>, |
| <option>socket</option> and |
| similar.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--property=</option></term> |
| <term><option>-p</option></term> |
| |
| <listitem><para>When showing |
| unit/job/manager information, limit |
| display to certain property names. If |
| not specified all set properties are |
| shown. The argument should be a |
| property name, such as |
| <literal>MainPID</literal>.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--all</option></term> |
| <term><option>-a</option></term> |
| |
| <listitem><para>When listing units, |
| show all units, regardless of their |
| state, including inactive units. When |
| showing unit/job/manager information, |
| show all properties regardless whether |
| they are set or not.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--fail</option></term> |
| |
| <listitem><para>If the requested |
| operation conflicts with an existing |
| unfinished operation, fail the |
| command. If this is not specified the |
| requested operation will replace the |
| pending job if |
| necessary.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--system</option></term> |
| |
| <listitem><para>Talk to the systemd |
| system manager. (Default)</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--session</option></term> |
| |
| <listitem><para>Talk to the systemd |
| session manager of the calling user.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--no-block</option></term> |
| |
| <listitem><para>Do not synchronously wait for |
| the requested operation to finish. If this is |
| not specified the job will be verified, |
| enqueued and <command>systemctl</command> will |
| wait until it is completed. By passing this |
| argument it is only verified and |
| enqueued.</para></listitem> </varlistentry> |
| |
| <varlistentry> |
| <term><option>--quiet</option></term> |
| <term><option>-q</option></term> |
| |
| <listitem><para>Suppress output to |
| STDOUT for <command>snapshot</command> |
| and |
| <command>check</command>.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><option>--no-wall</option></term> |
| |
| <listitem><para>Don't send wall |
| message before |
| halt, power-off, reboot.</para></listitem> |
| </varlistentry> |
| </variablelist> |
| |
| <para>The following commands are understood:</para> |
| |
| <variablelist> |
| <varlistentry> |
| <term><command>list-units</command></term> |
| |
| <listitem><para>List known units.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>start [NAME...]</command></term> |
| |
| <listitem><para>Start one or more |
| units specified on the command |
| line.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>stop [NAME...]</command></term> |
| |
| <listitem><para>Stop one or more units |
| specified on the command |
| line.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>reload [NAME...]</command></term> |
| |
| <listitem><para>Asks all services |
| whose units are listed on the command |
| line to reload their |
| configuration. Note that this will |
| reload the daemon configuration |
| itself, not the unit configuration |
| file of systemd. If you want systemd |
| to reload the configuration file of a |
| unit use the |
| <command>daemon-reload</command> |
| command. In other words: for the |
| example case of Apache, this will |
| reload Apache's |
| <filename>httpd.conf</filename> in the |
| web server, not the |
| <filename>apache.service</filename> |
| systemd unit file. </para> <para>This |
| command should not be confused with |
| the <command>daemon-reload</command> |
| or <command>load</command> |
| commands.</para></listitem> |
| |
| </varlistentry> |
| <varlistentry> |
| <term><command>restart [NAME...]</command></term> |
| |
| <listitem><para>Restart one or more |
| units specified on the command |
| line. If the units are not running yet |
| they will be |
| started.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>try-restart [NAME...]</command></term> |
| |
| <listitem><para>Restart one or more |
| units specified on the command |
| line. If the units are not running yet |
| the operation will |
| fail.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>reload-or-restart [NAME...]</command></term> |
| <term><command>reload-or-try-restart [NAME...]</command></term> |
| |
| <listitem><para>Reload one or more |
| units if they support it. If not |
| restart them |
| instead.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>isolate [NAME]</command></term> |
| |
| <listitem><para>Start the unit |
| specified on the command line and its |
| dependencies and stop all |
| others.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>check [NAME...]</command></term> |
| |
| <listitem><para>Check whether any of |
| the specified units is active |
| (i.e. running). Returns 0 if at least |
| one is active, non-zero |
| otherwise. Unless |
| <option>--quiet</option> is specified |
| this will also print the current unit |
| state to STDOUT.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>status [NAME...]</command></term> |
| |
| <listitem><para>Show short status |
| information about one or more |
| units. This shows terse runtime |
| information about |
| units.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>show [NAME...|JOB...]</command></term> |
| |
| <listitem><para>Show properties of |
| one or more units, jobs or the manager |
| itself. If no argument is specified |
| properties of the manager will be |
| shown. If a unit name is specified |
| properties of the unit is shown, |
| and if a job id is specified |
| properties of the job is |
| shown.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>load [NAME...]</command></term> |
| |
| <listitem><para>Load one or more units |
| specified on the command line. This |
| will simply load their configuration |
| from disk, but not start them. To |
| start them you need to use the |
| <command>start</command> command which |
| will implicitly load a unit that has |
| not been loaded yet. Note that systemd |
| garbage collects loaded units that are |
| not active or referenced by an active |
| unit. This means that units loaded |
| this way will usually not stay loaded |
| for long. Also note that this command |
| cannot be used to reload unit |
| configuration. Use the |
| <command>daemon-reload</command> |
| command for that. All in all, this |
| command is of little use except for |
| debugging.</para> |
| <para>This command should not be |
| confused with the |
| <command>daemon-reload</command> or |
| <command>reload</command> |
| commands.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>list-jobs</command></term> |
| |
| <listitem><para>List jobs that are in progress.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>cancel [JOB...]</command></term> |
| |
| <listitem><para>Cancel one or more |
| jobs specified on the command line by |
| their numeric job |
| IDs.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>clear-jobs</command></term> |
| |
| <listitem><para>Cancel all jobs that are in progress.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>monitor</command></term> |
| |
| <listitem><para>Monitor unit/job |
| changes. This is mostly useful for |
| debugging purposes and prints a line |
| each time systemd loads or unloads a |
| unit configuration file, or a unit |
| property changes.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>dump</command></term> |
| |
| <listitem><para>Dump server |
| status. This will output a (usually |
| very long) human readable manager |
| status dump. Its format is subject to |
| change without notice and should not |
| be parsed by |
| applications.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>snapshot [NAME]</command></term> |
| |
| <listitem><para>Create a snapshot. If |
| a snapshot name is specified, the new |
| snapshot will be named after it. If |
| none is specified an automatic |
| snapshot name is generated. In either |
| case, the snapshot name used is |
| printed to STDOUT, unless |
| <option>--quiet</option> is |
| specified.</para> |
| |
| <para>A snapshot refers to a saved |
| state of the systemd manager. It is |
| implemented itself as unit that is |
| generated dynamically with this |
| command and has dependencies on all |
| units active at the time. At a later |
| time the user may return to this state |
| by using the |
| <command>isolate</command> command on |
| the snapshot unit.</para></listitem> |
| |
| <para>Snapshots are only useful for |
| saving and restoring which units are |
| running or are stopped, they do not |
| save/restore any other |
| state. Snapshots are dynamic and lost |
| on reboot.</para> |
| </varlistentry> |
| <varlistentry> |
| <term><command>delete [NAME...]</command></term> |
| |
| <listitem><para>Remove a snapshot |
| previously created with |
| <command>snapshot</command>.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>daemon-reload</command></term> |
| |
| <listitem><para>Reload systemd manager |
| configuration. This will reload all |
| unit files and recreate the entire |
| dependency tree. While the daemon is |
| reloaded, all sockets systemd listens |
| on on behalf of user configuration will |
| stay accessible.</para> <para>This |
| command should not be confused with |
| the <command>load</command> or |
| <command>reload</command> |
| commands.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>daemon-reexec</command></term> |
| |
| <listitem><para>Reexecute the systemd |
| manager. This will serialize the |
| manager state, reexecute the process |
| and deserialize the state again. This |
| command is of little use except for |
| debugging and package |
| upgrades. Sometimes it might be |
| helpful as a heavy-weight |
| <command>daemon-reload</command>. While |
| the daemon is reexecuted all sockets |
| systemd listens on on behalf of user |
| configuration will stay |
| accessible.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>daemon-exit</command></term> |
| |
| <listitem><para>Ask the systemd |
| manager to quit. This is only |
| supported for session managers |
| (i.e. in conjunction with the |
| <option>--session</option> option) and |
| will fail otherwise.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>show-environment</command></term> |
| |
| <listitem><para>Dump the systemd |
| manager environment block. The |
| environment block will be dumped in |
| straight-forward form suitable for |
| sourcing into a shell script. This |
| environment block will be passed to |
| all processes the manager |
| spawns.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>set-environment [NAME=VALUE...]</command></term> |
| |
| <listitem><para>Set one or more |
| systemd manager environment variables, |
| as specified on the command |
| line.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>unset-environment [NAME...]</command></term> |
| |
| <listitem><para>Unset one or more |
| systemd manager environment |
| variables. If only a variable name is |
| specified it will be removed |
| regardless of its value. If a variable |
| and a value are specified the variable |
| is only removed if it has the |
| specified value.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><command>halt</command></term> |
| |
| <listitem><para>Shut down and halt the |
| system. This is mostly equivalent to |
| <command>start halt.target</command> |
| but also prints a wall message to all |
| users.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>poweroff</command></term> |
| |
| <listitem><para>Shut down and |
| power-off the system. This is mostly |
| equivalent to <command>start |
| poweroff.target</command> but also |
| prints a wall message to all |
| users.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>reboot</command></term> |
| |
| <listitem><para>Shut down and |
| reboot the system. This is mostly |
| equivalent to <command>start |
| reboot.target</command> but also |
| prints a wall message to all |
| users.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>default</command></term> |
| |
| <listitem><para>Enter default |
| mode. This is mostly equivalent to |
| <command>start |
| default.target</command>.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>rescue</command></term> |
| |
| <listitem><para>Enter rescue |
| mode. This is mostly equivalent to |
| <command>isolate |
| rescue.target</command> but also |
| prints a wall message to all |
| users.</para></listitem> |
| </varlistentry> |
| <varlistentry> |
| <term><command>emergency</command></term> |
| |
| <listitem><para>Enter emergency |
| mode. This is mostly equivalent to |
| <command>isolate |
| emergency.target</command> but also |
| prints a wall message to all |
| users.</para></listitem> |
| </varlistentry> |
| </variablelist> |
| |
| </refsect1> |
| |
| <refsect1> |
| <title>Exit status</title> |
| |
| <para>On success 0 is returned, a non-zero failure |
| code otherwise.</para> |
| </refsect1> |
| |
| <refsect1> |
| <title>See Also</title> |
| <para> |
| <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemadm</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
| </para> |
| </refsect1> |
| |
| </refentry> |