man/timesyncd.conf.xml

   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">
   4
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   6   This file is part of systemd.
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   8   Copyright 2014 Lennart Poettering
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  23
  24 <refentry id="timesyncd.conf" conditional='ENABLE_TIMESYNCD'
  25     xmlns:xi="http://www.w3.org/2001/XInclude">
  26   <refentryinfo>
  27     <title>timesyncd.conf</title>
  28     <productname>systemd</productname>
  29
  30     <authorgroup>
  31       <author>
  32         <contrib>Developer</contrib>
  33         <firstname>Lennart</firstname>
  34         <surname>Poettering</surname>
  35         <email>lennart@poettering.net</email>
  36       </author>
  37     </authorgroup>
  38   </refentryinfo>
  39
  40   <refmeta>
  41     <refentrytitle>timesyncd.conf</refentrytitle>
  42     <manvolnum>5</manvolnum>
  43   </refmeta>
  44
  45   <refnamediv>
  46     <refname>timesyncd.conf</refname>
  47     <refname>timesyncd.conf.d</refname>
  48     <refpurpose>Network Time Synchronization configuration files</refpurpose>
  49   </refnamediv>
  50
  51   <refsynopsisdiv>
  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>
  56   </refsynopsisdiv>
  57
  58   <refsect1>
  59     <title>Description</title>
  60
  61     <para>These configuration files control NTP network time
  62     synchronization.</para>
  63
  64   </refsect1>
  65
  66   <xi:include href="standard-conf.xml" xpointer="main-conf" />
  67
  68   <refsect1>
  69     <title>Options</title>
  70
  71     <variablelist class='network-directives'>
  72
  73       <varlistentry>
  74         <term><varname>NTP=</varname></term>
  75         <listitem><para>A space separated list of NTP servers host
  76         names or IP addresses. During runtime this list is combined
  77         with any per-interface NTP servers acquired from
  78         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
  79         systemd-timesyncd will contact all configured system or
  80         per-interface servers in turn until one is found that
  81         responds. This setting defaults to the empty
  82         list.</para></listitem>
  83       </varlistentry>
  84
  85       <varlistentry>
  86         <term><varname>FallbackNTP=</varname></term>
  87         <listitem><para>A space separated list of NTP server host
  88         names or IP addresses to be used as the fallback NTP servers.
  89         Any per-interface NTP servers obtained from
  90         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
  91         take precedence over this setting, as do any servers set via
  92         <varname>NTP=</varname> above. This setting is hence only used
  93         if no other NTP server information is known. If this option is
  94         not given, a compiled-in list of NTP servers is used
  95         instead.</para></listitem>
  96       </varlistentry>
  97
  98     </variablelist>
  99   </refsect1>
 100
 101   <refsect1>
 102       <title>See Also</title>
 103       <para>
 104       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 105       <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 106       <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 107       </para>
 108   </refsect1>
 109
 110 </refentry>