man/timesyncd.conf.xml

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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     <para>The following settings are configured in the <literal>[Time]</literal> section:</para>
  72
  73     <variablelist class='network-directives'>
  74
  75       <varlistentry>
  76         <term><varname>NTP=</varname></term>
  77         <listitem><para>A space-separated list of NTP server host
  78         names or IP addresses. During runtime this list is combined
  79         with any per-interface NTP servers acquired from
  80         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
  81         systemd-timesyncd will contact all configured system or
  82         per-interface servers in turn until one is found that
  83         responds. When the empty string is assigned, the list of
  84         NTP servers is reset, and all assignments prior to this one
  85         will have no effect. This setting defaults to an empty
  86         list.</para></listitem>
  87       </varlistentry>
  88
  89       <varlistentry>
  90         <term><varname>FallbackNTP=</varname></term>
  91         <listitem><para>A space-separated list of NTP server host
  92         names or IP addresses to be used as the fallback NTP servers.
  93         Any per-interface NTP servers obtained from
  94         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
  95         take precedence over this setting, as do any servers set via
  96         <varname>NTP=</varname> above. This setting is hence only used
  97         if no other NTP server information is known. When the empty
  98         string is assigned, the list of NTP servers is reset,
  99         and all assignments prior to this one will have no effect.
 100         If this option is not given, a compiled-in list of NTP servers
 101         is used instead.</para></listitem>
 102       </varlistentry>
 103
 104     </variablelist>
 105   </refsect1>
 106
 107   <refsect1>
 108       <title>See Also</title>
 109       <para>
 110       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 111       <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 112       <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 113       </para>
 114   </refsect1>
 115
 116 </refentry>