man/timesyncd.conf.xml

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   9   Copyright 2014 Lennart Poettering
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  24
  25 <refentry id="timesyncd.conf" conditional='ENABLE_TIMESYNCD'
  26           xmlns:xi="http://www.w3.org/2001/XInclude">
  27         <refentryinfo>
  28                 <title>timesyncd.conf</title>
  29                 <productname>systemd</productname>
  30
  31                 <authorgroup>
  32                         <author>
  33                                 <contrib>Developer</contrib>
  34                                 <firstname>Lennart</firstname>
  35                                 <surname>Poettering</surname>
  36                                 <email>lennart@poettering.net</email>
  37                         </author>
  38                 </authorgroup>
  39         </refentryinfo>
  40
  41         <refmeta>
  42                 <refentrytitle>timesyncd.conf</refentrytitle>
  43                 <manvolnum>5</manvolnum>
  44         </refmeta>
  45
  46         <refnamediv>
  47                 <refname>timesyncd.conf</refname>
  48                 <refname>timesyncd.conf.d</refname>
  49                 <refpurpose>Network Time Synchronization configuration files</refpurpose>
  50         </refnamediv>
  51
  52         <refsynopsisdiv>
  53                 <para><filename>/etc/systemd/timesyncd.conf</filename></para>
  54                 <para><filename>/etc/systemd/timesyncd.conf.d/*.conf</filename></para>
  55                 <para><filename>/run/systemd/timesyncd.conf.d/*.conf</filename></para>
  56                 <para><filename>/usr/lib/systemd/timesyncd.conf.d/*.conf</filename></para>
  57         </refsynopsisdiv>
  58
  59         <refsect1>
  60                 <title>Description</title>
  61
  62                 <para>These configuration files control NTP network time
  63                 synchronization.</para>
  64
  65         </refsect1>
  66
  67         <xi:include href="standard-conf.xml" xpointer="confd" />
  68         <xi:include href="standard-conf.xml" xpointer="conf" />
  69
  70         <refsect1>
  71                 <title>Options</title>
  72
  73                 <variablelist class='network-directives'>
  74
  75                         <varlistentry>
  76                                 <term><varname>NTP=</varname></term>
  77                                 <listitem><para>A space separated list
  78                                 of NTP servers host names or IP
  79                                 addresses. During runtime this list is
  80                                 combined with any per-interface NTP
  81                                 servers acquired from
  82                                 <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. systemd-timesyncd
  83                                 will contact all configured system or
  84                                 per-interface servers in turn until
  85                                 one is found that responds. This
  86                                 setting defaults to the empty
  87                                 list.</para></listitem>
  88                         </varlistentry>
  89
  90                         <varlistentry>
  91                                 <term><varname>FallbackNTP=</varname></term>
  92                                 <listitem><para>A space separated list
  93                                 of NTP server host names or IP
  94                                 addresses to be used as the fallback
  95                                 NTP servers. Any per-interface NTP
  96                                 servers obtained from
  97                                 <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
  98                                 take precedence over this setting, as
  99                                 do any servers set via
 100                                 <varname>NTP=</varname> above. This
 101                                 setting is hence only used if no other
 102                                 NTP server information is known. If
 103                                 this option is not given, a
 104                                 compiled-in list of NTP servers is
 105                                 used instead.</para></listitem>
 106                         </varlistentry>
 107
 108                 </variablelist>
 109         </refsect1>
 110
 111         <refsect1>
 112                   <title>See Also</title>
 113                   <para>
 114                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 115                         <citerefentry><refentrytitle>systemd-timesyncd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 116                         <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 117                   </para>
 118         </refsect1>
 119
 120 </refentry>