man/timedatectl.xml - systemd-stable - Rivoreo Source Code Repositories

 <?xml version='1.0'?> <!--*-nxml-*-->
 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

 <!--
   SPDX-License-Identifier: LGPL-2.1+
 -->

 <refentry id="timedatectl" conditional='ENABLE_TIMEDATECTL'
   xmlns:xi="http://www.w3.org/2001/XInclude">

   <refentryinfo>
     <title>timedatectl</title>
     <productname>systemd</productname>
   </refentryinfo>

   <refmeta>
     <refentrytitle>timedatectl</refentrytitle>
     <manvolnum>1</manvolnum>
   </refmeta>

   <refnamediv>
     <refname>timedatectl</refname>
     <refpurpose>Control the system time and date</refpurpose>
   </refnamediv>

   <refsynopsisdiv>
     <cmdsynopsis>
       <command>timedatectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>
     </cmdsynopsis>
   </refsynopsisdiv>

   <refsect1>
     <title>Description</title>

     <para><command>timedatectl</command> may be used to query and
     change the system clock and its settings.</para>

     <para>Use
     <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
     to initialize the system time zone for mounted (but not booted)
     system images.</para>

     <para><command>timedatectl</command> may be used to show the current status of
     <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
     </para>

   </refsect1>

   <refsect1>
     <title>Options</title>

     <para>The following options are understood:</para>

     <variablelist>
       <varlistentry>
         <term><option>--no-ask-password</option></term>

         <listitem><para>Do not query the user for authentication for
         privileged operations.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><option>--adjust-system-clock</option></term>

         <listitem><para>If <command>set-local-rtc</command> is invoked
         and this option is passed, the system clock is synchronized
         from the RTC again, taking the new setting into account.
         Otherwise, the RTC is synchronized from the system
         clock.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><option>--monitor</option></term>

         <listitem><para>If <command>timesync-status</command> is invoked and this option is passed, then
         <command>timedatectl</command> monitors the status of
         <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
         and updates the outputs. Use <keycombo><keycap>Ctrl</keycap><keycap>C</keycap></keycombo> to terminate the
         monitoring.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><option>-a</option></term>
         <term><option>-all</option></term>

         <listitem><para>When showing properties of
         <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
         show all properties regardless of whether they are set or not.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><option>-p</option></term>
         <term><option>--property=</option></term>

         <listitem><para>When showing properties of
         <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
         limit display to certain properties as specified as argument. If not specified, all set properties are shown.
         The argument should be a property name, such as <literal>ServerName</literal>. If specified more than once,
         all properties with the specified names are shown.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><option>--value</option></term>

         <listitem>
           <para>When printing properties with <command>show-timesync</command>, only print the value, and skip the
           property name and <literal>=</literal>.</para></listitem>
       </varlistentry>

       <xi:include href="user-system-options.xml" xpointer="host" />
       <xi:include href="user-system-options.xml" xpointer="machine" />

       <xi:include href="standard-options.xml" xpointer="help" />
       <xi:include href="standard-options.xml" xpointer="version" />
       <xi:include href="standard-options.xml" xpointer="no-pager" />
     </variablelist>
   </refsect1>

   <refsect1>
     <title>Commands</title>

     <para>The following commands are understood:</para>

     <variablelist>
       <varlistentry>
         <term><command>status</command></term>

         <listitem><para>Show current settings of the system clock and RTC,
         including whether network time synchronization through
         <filename>systemd-timesyncd.service</filename> is active. Even if it is
         inactive, a different service might still synchronize the clock.
         If no command is specified, this is the implied default.
         </para></listitem>
       </varlistentry>

       <varlistentry>
         <term><command>show</command></term>

         <listitem><para>Show the same information as <option>status</option>, but in machine readable form.
         This command is intended to be used whenever computer-parsable output is required.
         Use <option>status</option> if you are looking for formatted human-readable output.</para>
         <para>By default, empty properties are suppressed. Use <option>--all</option> to show those too.
         To select specific properties to show, use <option>--property=</option>.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><command>set-time [TIME]</command></term>

         <listitem><para>Set the system clock to the specified time.
         This will also update the RTC time accordingly. The time may
         be specified in the format "2012-10-30
         18:17:16".</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><command>set-timezone [TIMEZONE]</command></term>

         <listitem><para>Set the system time zone to the specified
         value. Available timezones can be listed with
         <command>list-timezones</command>. If the RTC is configured to
         be in the local time, this will also update the RTC time. This
         call will alter the <filename>/etc/localtime</filename>
         symlink. See
         <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>
         for more information.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><command>list-timezones</command></term>

         <listitem><para>List available time zones, one per line.
         Entries from the list can be set as the system timezone with
         <command>set-timezone</command>.</para></listitem>
       </varlistentry>

       <varlistentry>
         <term><command>set-local-rtc [BOOL]</command></term>

         <listitem><para>Takes a boolean argument. If
         <literal>0</literal>, the system is configured to maintain the
         RTC in universal time. If <literal>1</literal>, it will
         maintain the RTC in local time instead. Note that maintaining
         the RTC in the local timezone is not fully supported and will
         create various problems with time zone changes and daylight
         saving adjustments. If at all possible, keep the RTC in UTC
         mode. Note that invoking this will also synchronize the RTC
         from the system clock, unless
         <option>--adjust-system-clock</option> is passed (see above).
         This command will change the 3rd line of
         <filename>/etc/adjtime</filename>, as documented in
         <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
         </para></listitem>
       </varlistentry>

       <varlistentry>
         <term><command>set-ntp [BOOL]</command></term>

         <listitem><para>Takes a boolean argument. Controls whether network time synchronization is active
         and enabled (if available). If the argument is true, this enables and starts the first existed
         service listed in the environment variable <varname>$SYSTEMD_TIMEDATED_NTP_SERVICES</varname>
         of <filename>systemd-timedated.service</filename>. If the argument is false, then this disables and
         stops the all services listed in <varname>$SYSTEMD_TIMEDATED_NTP_SERVICES</varname>.</para></listitem>
       </varlistentry>

     </variablelist>

     <refsect2>
       <title>systemd-timesyncd Commands</title>

       <para>The following commands are specific to
       <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
       </para>

       <variablelist>
         <varlistentry>
           <term><command>timesync-status</command></term>

           <listitem><para>Show current status of
           <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
           If <option>--monitor</option> is specified, then this will monitor the status updates.</para></listitem>
         </varlistentry>

         <varlistentry>
           <term><command>show-timesync</command></term>

           <listitem><para>Show the same information as <option>timesync-status</option>, but in machine readable form.
           This command is intended to be used whenever computer-parsable output is required.
           Use <option>timesync-status</option> if you are looking for formatted human-readable output.</para>
           <para>By default, empty properties are suppressed. Use <option>--all</option> to show those too.
           To select specific properties to show, use <option>--property=</option>.</para></listitem>
         </varlistentry>
       </variablelist>

     </refsect2>

   </refsect1>

   <refsect1>
     <title>Exit status</title>

     <para>On success, 0 is returned, a non-zero failure
     code otherwise.</para>
   </refsect1>

   <xi:include href="less-variables.xml" />

   <refsect1>
     <title>Examples</title>
     <para>Show current settings:
     <programlisting>$ timedatectl
                Local time: Thu 2017-09-21 16:08:56 CEST
            Universal time: Thu 2017-09-21 14:08:56 UTC
                  RTC time: Thu 2017-09-21 14:08:56
                 Time zone: Europe/Warsaw (CEST, +0200)
 System clock synchronized: yes
               NTP service: active
           RTC in local TZ: no</programlisting>
     </para>

     <para>Enable network time synchronization:
     <programlisting>$ timedatectl set-ntp true
 ==== AUTHENTICATING FOR org.freedesktop.timedate1.set-ntp ===
 Authentication is required to control whether network time synchronization shall be enabled.
 Authenticating as: user
 Password: ********
 ==== AUTHENTICATION COMPLETE ===</programlisting>

     <programlisting>$ systemctl status systemd-timesyncd.service
 ● systemd-timesyncd.service - Network Time Synchronization
    Loaded: loaded (/usr/lib/systemd/system/systemd-timesyncd.service; enabled)
    Active: active (running) since Mo 2015-03-30 14:20:38 CEST; 5s ago
      Docs: man:systemd-timesyncd.service(8)
  Main PID: 595 (systemd-timesyn)
    Status: "Using Time Server 216.239.38.15:123 (time4.google.com)."
    CGroup: /system.slice/systemd-timesyncd.service
            └─595 /usr/lib/systemd/systemd-timesyncd
 …</programlisting>
     </para>

     <para>Show current status of
     <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>:
     <programlisting>$ timedatectl timesync-status
        Server: 216.239.38.15 (time4.google.com)
 Poll interval: 1min 4s (min: 32s; max 34min 8s)
          Leap: normal
       Version: 4
       Stratum: 1
     Reference: GPS
     Precision: 1us (-20)
 Root distance: 335us (max: 5s)
        Offset: +316us
         Delay: 349us
        Jitter: 0
  Packet count: 1
     Frequency: -8.802ppm</programlisting>
     </para>

   </refsect1>

   <refsect1>
     <title>See Also</title>
     <para>
       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
       <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
       <citerefentry project='man-pages'><refentrytitle>date</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
     </para>
   </refsect1>

 </refentry>
	<?xml version='1.0'?> <!---nxml--->
	<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
	"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

	<!--
	SPDX-License-Identifier: LGPL-2.1+
	-->

	<refentry id="timedatectl" conditional='ENABLE_TIMEDATECTL'
	xmlns:xi="http://www.w3.org/2001/XInclude">

	<refentryinfo>
	<title>timedatectl</title>
	<productname>systemd</productname>
	</refentryinfo>

	<refmeta>
	<refentrytitle>timedatectl</refentrytitle>
	<manvolnum>1</manvolnum>
	</refmeta>

	<refnamediv>
	<refname>timedatectl</refname>
	<refpurpose>Control the system time and date</refpurpose>
	</refnamediv>

	<refsynopsisdiv>
	<cmdsynopsis>
	<command>timedatectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>
	</cmdsynopsis>
	</refsynopsisdiv>

	<refsect1>
	<title>Description</title>

	<para><command>timedatectl</command> may be used to query and
	change the system clock and its settings.</para>

	<para>Use
	<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
	to initialize the system time zone for mounted (but not booted)
	system images.</para>

	<para><command>timedatectl</command> may be used to show the current status of
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
	</para>

	</refsect1>

	<refsect1>
	<title>Options</title>

	<para>The following options are understood:</para>

	<variablelist>
	<varlistentry>
	<term><option>--no-ask-password</option></term>

	<listitem><para>Do not query the user for authentication for
	privileged operations.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><option>--adjust-system-clock</option></term>

	<listitem><para>If <command>set-local-rtc</command> is invoked
	and this option is passed, the system clock is synchronized
	from the RTC again, taking the new setting into account.
	Otherwise, the RTC is synchronized from the system
	clock.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><option>--monitor</option></term>

	<listitem><para>If <command>timesync-status</command> is invoked and this option is passed, then
	<command>timedatectl</command> monitors the status of
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
	and updates the outputs. Use <keycombo><keycap>Ctrl</keycap><keycap>C</keycap></keycombo> to terminate the
	monitoring.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><option>-a</option></term>
	<term><option>-all</option></term>

	<listitem><para>When showing properties of
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
	show all properties regardless of whether they are set or not.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><option>-p</option></term>
	<term><option>--property=</option></term>

	<listitem><para>When showing properties of
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
	limit display to certain properties as specified as argument. If not specified, all set properties are shown.
	The argument should be a property name, such as <literal>ServerName</literal>. If specified more than once,
	all properties with the specified names are shown.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><option>--value</option></term>

	<listitem>
	<para>When printing properties with <command>show-timesync</command>, only print the value, and skip the
	property name and <literal>=</literal>.</para></listitem>
	</varlistentry>

	<xi:include href="user-system-options.xml" xpointer="host" />
	<xi:include href="user-system-options.xml" xpointer="machine" />

	<xi:include href="standard-options.xml" xpointer="help" />
	<xi:include href="standard-options.xml" xpointer="version" />
	<xi:include href="standard-options.xml" xpointer="no-pager" />
	</variablelist>
	</refsect1>

	<refsect1>
	<title>Commands</title>

	<para>The following commands are understood:</para>

	<variablelist>
	<varlistentry>
	<term><command>status</command></term>

	<listitem><para>Show current settings of the system clock and RTC,
	including whether network time synchronization through
	<filename>systemd-timesyncd.service</filename> is active. Even if it is
	inactive, a different service might still synchronize the clock.
	If no command is specified, this is the implied default.
	</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><command>show</command></term>

	<listitem><para>Show the same information as <option>status</option>, but in machine readable form.
	This command is intended to be used whenever computer-parsable output is required.
	Use <option>status</option> if you are looking for formatted human-readable output.</para>
	<para>By default, empty properties are suppressed. Use <option>--all</option> to show those too.
	To select specific properties to show, use <option>--property=</option>.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><command>set-time [TIME]</command></term>

	<listitem><para>Set the system clock to the specified time.
	This will also update the RTC time accordingly. The time may
	be specified in the format "2012-10-30
	18:17:16".</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><command>set-timezone [TIMEZONE]</command></term>

	<listitem><para>Set the system time zone to the specified
	value. Available timezones can be listed with
	<command>list-timezones</command>. If the RTC is configured to
	be in the local time, this will also update the RTC time. This
	call will alter the <filename>/etc/localtime</filename>
	symlink. See
	<citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>
	for more information.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><command>list-timezones</command></term>

	<listitem><para>List available time zones, one per line.
	Entries from the list can be set as the system timezone with
	<command>set-timezone</command>.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><command>set-local-rtc [BOOL]</command></term>

	<listitem><para>Takes a boolean argument. If
	<literal>0</literal>, the system is configured to maintain the
	RTC in universal time. If <literal>1</literal>, it will
	maintain the RTC in local time instead. Note that maintaining
	the RTC in the local timezone is not fully supported and will
	create various problems with time zone changes and daylight
	saving adjustments. If at all possible, keep the RTC in UTC
	mode. Note that invoking this will also synchronize the RTC
	from the system clock, unless
	<option>--adjust-system-clock</option> is passed (see above).
	This command will change the 3rd line of
	<filename>/etc/adjtime</filename>, as documented in
	<citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
	</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><command>set-ntp [BOOL]</command></term>

	<listitem><para>Takes a boolean argument. Controls whether network time synchronization is active
	and enabled (if available). If the argument is true, this enables and starts the first existed
	service listed in the environment variable <varname>$SYSTEMD_TIMEDATED_NTP_SERVICES</varname>
	of <filename>systemd-timedated.service</filename>. If the argument is false, then this disables and
	stops the all services listed in <varname>$SYSTEMD_TIMEDATED_NTP_SERVICES</varname>.</para></listitem>
	</varlistentry>

	</variablelist>

	<refsect2>
	<title>systemd-timesyncd Commands</title>

	<para>The following commands are specific to
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
	</para>

	<variablelist>
	<varlistentry>
	<term><command>timesync-status</command></term>

	<listitem><para>Show current status of
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
	If <option>--monitor</option> is specified, then this will monitor the status updates.</para></listitem>
	</varlistentry>

	<varlistentry>
	<term><command>show-timesync</command></term>

	<listitem><para>Show the same information as <option>timesync-status</option>, but in machine readable form.
	This command is intended to be used whenever computer-parsable output is required.
	Use <option>timesync-status</option> if you are looking for formatted human-readable output.</para>
	<para>By default, empty properties are suppressed. Use <option>--all</option> to show those too.
	To select specific properties to show, use <option>--property=</option>.</para></listitem>
	</varlistentry>
	</variablelist>

	</refsect2>

	</refsect1>

	<refsect1>
	<title>Exit status</title>

	<para>On success, 0 is returned, a non-zero failure
	code otherwise.</para>
	</refsect1>

	<xi:include href="less-variables.xml" />

	<refsect1>
	<title>Examples</title>
	<para>Show current settings:
	<programlisting>$ timedatectl
	Local time: Thu 2017-09-21 16:08:56 CEST
	Universal time: Thu 2017-09-21 14:08:56 UTC
	RTC time: Thu 2017-09-21 14:08:56
	Time zone: Europe/Warsaw (CEST, +0200)
	System clock synchronized: yes
	NTP service: active
	RTC in local TZ: no</programlisting>
	</para>

	<para>Enable network time synchronization:
	<programlisting>$ timedatectl set-ntp true
	==== AUTHENTICATING FOR org.freedesktop.timedate1.set-ntp ===
	Authentication is required to control whether network time synchronization shall be enabled.
	Authenticating as: user
	Password: ********
	==== AUTHENTICATION COMPLETE ===</programlisting>

	<programlisting>$ systemctl status systemd-timesyncd.service
	● systemd-timesyncd.service - Network Time Synchronization
	Loaded: loaded (/usr/lib/systemd/system/systemd-timesyncd.service; enabled)
	Active: active (running) since Mo 2015-03-30 14:20:38 CEST; 5s ago
	Docs: man:systemd-timesyncd.service(8)
	Main PID: 595 (systemd-timesyn)
	Status: "Using Time Server 216.239.38.15:123 (time4.google.com)."
	CGroup: /system.slice/systemd-timesyncd.service
	└─595 /usr/lib/systemd/systemd-timesyncd
	…</programlisting>
	</para>

	<para>Show current status of
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>:
	<programlisting>$ timedatectl timesync-status
	Server: 216.239.38.15 (time4.google.com)
	Poll interval: 1min 4s (min: 32s; max 34min 8s)
	Leap: normal
	Version: 4
	Stratum: 1
	Reference: GPS
	Precision: 1us (-20)
	Root distance: 335us (max: 5s)
	Offset: +316us
	Delay: 349us
	Jitter: 0
	Packet count: 1
	Frequency: -8.802ppm</programlisting>
	</para>

	</refsect1>

	<refsect1>
	<title>See Also</title>
	<para>
	<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
	<citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
	<citerefentry project='man-pages'><refentrytitle>date</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
	<citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
	<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
	<citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
	<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
	<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
	</para>
	</refsect1>

	</refentry>