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5aded36978
It is annoying when we have dead links on fd.o. Add project='man-pages|die-net|archlinux' to <citerefentry>-ies. In generated html, add external links to http://man7.org/linux/man-pages/man, http://linux.die.net/man/, https://www.archlinux.org/. By default, pages in sections 2 and 4 go to man7, since Michael Kerrisk is the autorative source on kernel related stuff. The rest of links goes to linux.die.net, because they have the manpages. Except for the pacman stuff, since it seems to be only available from archlinux.org. Poor gummiboot gets no link, because gummitboot(8) ain't to be found on the net. According to common wisdom, that would mean that it does not exist. But I have seen Kay using it, so I know it does, and deserves to be found. Can somebody be nice and put it up somewhere?
254 lines
11 KiB
XML
254 lines
11 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="timedatectl" conditional='ENABLE_TIMEDATED'
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>timedatectl</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>timedatectl</refentrytitle>
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<manvolnum>1</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>timedatectl</refname>
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<refpurpose>Control the system time and date</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>timedatectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>timedatectl</command> may be used to
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query and change the system clock and its
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settings.</para>
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<para>Use
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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to initialize the system time zone for mounted (but not
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booted) system images.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>The following options are understood:</para>
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<variablelist>
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<varlistentry>
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<term><option>--no-ask-password</option></term>
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<listitem><para>Do not query the user
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for authentication for privileged
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operations.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--adjust-system-clock</option></term>
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<listitem><para>If
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<command>set-local-rtc</command> is
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invoked and this option is passed, the
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system clock is synchronized from the
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RTC again, taking the new setting into
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account. Otherwise, the RTC is
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synchronized from the system
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clock.</para></listitem>
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</varlistentry>
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<xi:include href="user-system-options.xml" xpointer="host" />
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<xi:include href="user-system-options.xml" xpointer="machine" />
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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<xi:include href="standard-options.xml" xpointer="no-pager" />
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</variablelist>
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<para>The following commands are understood:</para>
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<variablelist>
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<varlistentry>
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<term><command>status</command></term>
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<listitem><para>Show current settings
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of the system clock and
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RTC.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>set-time [TIME]</command></term>
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<listitem><para>Set the system clock
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to the specified time. This will also
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update the RTC time accordingly. The time
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may be specified in the format
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"2012-10-30
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18:17:16".</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>set-timezone [TIMEZONE]</command></term>
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<listitem><para>Set the system time
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zone to the specified value. Available
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timezones can be listed with
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<command>list-timezones</command>. If
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the RTC is configured to be in the
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local time, this will also update the
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RTC time. This call will alter the
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<filename>/etc/localtime</filename>
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symlink. See
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<citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for more
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information.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>list-timezones</command></term>
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<listitem><para>List available time
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zones, one per line. Entries from the
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list can be set as the system
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timezone with
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<command>set-timezone</command>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>set-local-rtc [BOOL]</command></term>
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<listitem><para>Takes a boolean
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argument. If <literal>0</literal>, the
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system is configured to maintain the
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RTC in universal time. If
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<literal>1</literal>, it will maintain
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the RTC in local time instead. Note
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that maintaining the RTC in the local
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timezone is not fully supported and
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will create various problems with time
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zone changes and daylight saving
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adjustments. If at all possible, keep the
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RTC in UTC mode. Note that invoking this
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will also synchronize the RTC from the
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system clock, unless
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<option>--adjust-system-clock</option> is
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passed (see above). This command will
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change the 3rd line of
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<filename>/etc/adjtime</filename>, as
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documented in
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<citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>set-ntp [BOOL]</command></term>
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<listitem><para>Takes a boolean
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argument. Controls whether NTP based
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network time synchronization is
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enabled (if
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available).</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Exit status</title>
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<para>On success, 0 is returned, a non-zero failure
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code otherwise.</para>
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</refsect1>
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<xi:include href="less-variables.xml" />
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<refsect1>
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<title>Examples</title>
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<para>Show current settings:
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<programlisting>$ timedatectl
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Local time: Fri, 2012-11-02 09:26:46 CET
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Universal time: Fri, 2012-11-02 08:26:46 UTC
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RTC time: Fri, 2012-11-02 08:26:45
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Timezone: Europe/Warsaw
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UTC offset: +0100
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NTP enabled: no
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NTP synchronized: no
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RTC in local TZ: no
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DST active: no
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Last DST change: CEST → CET, DST became inactive
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Sun, 2012-10-28 02:59:59 CEST
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Sun, 2012-10-28 02:00:00 CET
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Next DST change: CET → CEST, DST will become active
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the clock will jump one hour forward
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Sun, 2013-03-31 01:59:59 CET
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Sun, 2013-03-31 03:00:00 CEST</programlisting>
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</para>
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<para>Enable an NTP daemon (chronyd):
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<programlisting>$ timedatectl set-ntp true
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==== AUTHENTICATING FOR org.freedesktop.timedate1.set-ntp ===
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Authentication is required to control whether network time synchronization shall be enabled.
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Authenticating as: user
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Password: ********
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==== AUTHENTICATION COMPLETE ===</programlisting>
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<programlisting>$ systemctl status chronyd.service
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chronyd.service - NTP client/server
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Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled)
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Active: active (running) since Fri, 2012-11-02 09:36:25 CET; 5s ago
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...</programlisting>
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</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>date</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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