1 <?xml version='1.0'?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
6 This file is part of systemd.
8 Copyright 2014 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 <refentry id="timesyncd.conf" conditional='ENABLE_TIMESYNCD'
25 xmlns:xi="http://www.w3.org/2001/XInclude">
27 <title>timesyncd.conf</title>
28 <productname>systemd</productname>
32 <contrib>Developer</contrib>
33 <firstname>Lennart</firstname>
34 <surname>Poettering</surname>
35 <email>lennart@poettering.net</email>
41 <refentrytitle>timesyncd.conf</refentrytitle>
42 <manvolnum>5</manvolnum>
46 <refname>timesyncd.conf</refname>
47 <refname>timesyncd.conf.d</refname>
48 <refpurpose>Network Time Synchronization configuration files</refpurpose>
52 <para><filename>/etc/systemd/timesyncd.conf</filename></para>
53 <para><filename>/etc/systemd/timesyncd.conf.d/*.conf</filename></para>
54 <para><filename>/run/systemd/timesyncd.conf.d/*.conf</filename></para>
55 <para><filename>/usr/lib/systemd/timesyncd.conf.d/*.conf</filename></para>
59 <title>Description</title>
61 <para>These configuration files control NTP network time
62 synchronization.</para>
66 <xi:include href="standard-conf.xml" xpointer="confd" />
67 <xi:include href="standard-conf.xml" xpointer="conf" />
70 <title>Options</title>
72 <variablelist class='network-directives'>
75 <term><varname>NTP=</varname></term>
76 <listitem><para>A space separated list of NTP servers host
77 names or IP addresses. During runtime this list is combined
78 with any per-interface NTP servers acquired from
79 <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
80 systemd-timesyncd will contact all configured system or
81 per-interface servers in turn until one is found that
82 responds. This setting defaults to the empty
83 list.</para></listitem>
87 <term><varname>FallbackNTP=</varname></term>
88 <listitem><para>A space separated list of NTP server host
89 names or IP addresses to be used as the fallback NTP servers.
90 Any per-interface NTP servers obtained from
91 <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
92 take precedence over this setting, as do any servers set via
93 <varname>NTP=</varname> above. This setting is hence only used
94 if no other NTP server information is known. If this option is
95 not given, a compiled-in list of NTP servers is used
96 instead.</para></listitem>
103 <title>See Also</title>
105 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
106 <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
107 <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>