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+<?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="systemd-timedated.service" conditional='ENABLE_TIMEDATED'>
+
+ <refentryinfo>
+ <title>systemd-timedated.service</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-timedated.service</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-timedated.service</refname>
+ <refname>systemd-timedated</refname>
+ <refpurpose>Time and date bus mechanism</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-timedated.service</filename></para>
+ <para><filename>/usr/lib/systemd/systemd-timedated</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><filename>systemd-timedated</filename> is a system service
+ that may be used as a mechanism to change the system clock and
+ timezone, as well as to enable/disable NTP time synchronization.
+ <filename>systemd-timedated</filename> is automatically activated
+ on request and terminates itself when it is unused.</para>
+
+ <para>The tool
+ <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ is a command line client to this service.</para>
+
+ <para>See the <ulink
+ url="https://www.freedesktop.org/wiki/Software/systemd/timedated">
+ developer documentation</ulink> for information about the APIs
+ <filename>systemd-timedated</filename> provides.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Environment</title>
+
+ <variablelist class='environment-variables'>
+ <varlistentry>
+ <term><varname>$SYSTEMD_TIMEDATED_NTP_SERVICES</varname></term>
+
+ <listitem><para>Colon-separated list of unit names of NTP client services.
+ If not set, then
+ <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ is used. See the entries of NTP related commands of
+ <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ for details about this.</para>
+
+ <para>Example:
+ <programlisting>SYSTEMD_TIMEDATED_NTP_SERVICES=ntpd.service:chronyd.service:systemd-timesyncd.service</programlisting>
+ </para></listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry project='man-pages'><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-timesyncd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>