+++ /dev/null
-<?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.</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 NTP
- based network time synchronization is enabled (if
- available).</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: Fri, 2012-11-02 09:26:46 CET
- Universal time: Fri, 2012-11-02 08:26:46 UTC
- RTC time: Fri, 2012-11-02 08:26:45
- Timezone: Europe/Warsaw
- UTC offset: +0100
- NTP enabled: no
-NTP synchronized: no
- RTC in local TZ: no
- DST active: no
- Last DST change: CEST → CET, DST became inactive
- Sun, 2012-10-28 02:59:59 CEST
- Sun, 2012-10-28 02:00:00 CET
- Next DST change: CET → CEST, DST will become active
- the clock will jump one hour forward
- Sun, 2013-03-31 01:59:59 CET
- Sun, 2013-03-31 03:00:00 CEST</programlisting>
- </para>
-
- <para>Enable an NTP daemon (chronyd):
- <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 chronyd.service
-chronyd.service - NTP client/server
- Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled)
- Active: active (running) since Fri, 2012-11-02 09:36:25 CET; 5s ago
-...</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-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
- </para>
- </refsect1>
-
-</refentry>
~ianmdlvl / elogind.git / blobdiff