<?xml version='1.0'?> <!--*-nxml-*--> <?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?> <!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 2014 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="timesyncd.conf" conditional='ENABLE_TIMESYNCD'> <refentryinfo> <title>timesyncd.conf</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>timesyncd.conf</refentrytitle> <manvolnum>5</manvolnum> </refmeta> <refnamediv> <refname>timesyncd.conf</refname> <refpurpose>Network Time Synchronization configuration file</refpurpose> </refnamediv> <refsynopsisdiv> <para><filename>/etc/systemd/timesyncd.conf</filename></para> </refsynopsisdiv> <refsect1> <title>Description</title> <para>When starting, systemd-timesyncd will read the configuration file <filename>timesyncd.conf</filename>. This configuration file controls NTP network time synchronization.</para> </refsect1> <refsect1> <title>Options</title> <variablelist class='network-directives'> <varlistentry> <term><varname>NTP=</varname></term> <listitem><para>A space separated list of NTP servers host names or IP addresses. During runtime this list is combined with any per-interface NTP servers acquired from <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. systemd-timesyncd will contact all configured system or per-interface servers in turn until one is found that responds. This setting defaults to the empty list.</para></listitem> </varlistentry> <varlistentry> <term><varname>FallbackNTP=</varname></term> <listitem><para>A space separated list of NTP server host names or IP addresses to be used as the fallback NTP servers. Any per-interface NTP servers obtained from <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> take precedence over this setting, as do any servers set via <varname>NTP=</varname> above. This setting is hence only used if no other NTP server information is known. If this option is not given, a compiled-in list of NTP servers is used instead.</para></listitem> </varlistentry> </variablelist> </refsect1> <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> </para> </refsect1> </refentry>