mirror of
https://github.com/systemd/systemd.git
synced 2024-11-01 00:51:24 +03:00
251 lines
9.7 KiB
XML
251 lines
9.7 KiB
XML
<?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">
|
|
|
|
<!--
|
|
This file is part of systemd.
|
|
|
|
Copyright 2012 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
-->
|
|
|
|
<refentry id="timedatectl" conditional='ENABLE_TIMEDATED'
|
|
xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>timedatectl</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>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>
|
|
</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>
|
|
|
|
<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>
|
|
|
|
<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.
|
|
</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). This enables and starts, or disables and stops the
|
|
<filename>systemd-timesyncd.service</filename> unit. It does
|
|
not affect the state of any other, unrelated network time
|
|
synchronization services that might be installed on the
|
|
system. This command is hence mostly equivalent to:
|
|
<command>systemctl enable --now
|
|
systemd-timesyncd.service</command> and <command>systemctl
|
|
disable --now systemd-timesyncd.service</command>, but is
|
|
protected by a different access policy.</para>
|
|
|
|
<para>Note that even if time synchronization is turned off
|
|
with this command, another unrelated system service might
|
|
still synchronize the clock with the network. Also note that,
|
|
strictly speaking,
|
|
<filename>systemd-timesyncd.service</filename> does more than
|
|
just network time synchronization, as it ensures a monotonic
|
|
clock on systems without RTC even if no network is
|
|
available. See
|
|
<citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
for details about this.</para></listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</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
|
|
systemd-timesyncd.service active: yes
|
|
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>
|
|
</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>
|