man/localtime.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 <!ENTITY % entities SYSTEM "custom-entities.ent" >
   5 %entities;
   6 ]>
   7
   8 <!--
   9   This file is part of systemd.
  10
  11   Copyright 2010 Lennart Poettering
  12   Copyright 2012 Shawn Landden
  13
  14   systemd is free software; you can redistribute it and/or modify it
  15   under the terms of the GNU Lesser General Public License as published by
  16   the Free Software Foundation; either version 2.1 of the License, or
  17   (at your option) any later version.
  18
  19   systemd is distributed in the hope that it will be useful, but
  20   WITHOUT ANY WARRANTY; without even the implied warranty of
  21   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  22   Lesser General Public License for more details.
  23
  24   You should have received a copy of the GNU Lesser General Public License
  25   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  26 -->
  27
  28 <refentry id="localtime">
  29   <refentryinfo>
  30     <title>localtime</title>
  31     <productname>systemd</productname>
  32
  33     <authorgroup>
  34       <author>
  35         <contrib>Developer</contrib>
  36         <firstname>Lennart</firstname>
  37         <surname>Poettering</surname>
  38         <email>lennart@poettering.net</email>
  39       </author>
  40       <author>
  41         <contrib>Developer</contrib>
  42         <firstname>Shawn</firstname>
  43         <surname>Landden</surname>
  44         <email>shawnlandden@gmail.com</email>
  45       </author>
  46     </authorgroup>
  47   </refentryinfo>
  48
  49   <refmeta>
  50     <refentrytitle>localtime</refentrytitle>
  51     <manvolnum>5</manvolnum>
  52   </refmeta>
  53
  54   <refnamediv>
  55     <refname>localtime</refname>
  56     <refpurpose>Local timezone configuration file</refpurpose>
  57   </refnamediv>
  58
  59   <refsynopsisdiv>
  60     <para><filename>/etc/localtime</filename> -&gt; <filename>../usr/share/zoneinfo/…</filename></para>
  61   </refsynopsisdiv>
  62
  63   <refsect1>
  64     <title>Description</title>
  65
  66     <para>The <filename>/etc/localtime</filename> file configures the
  67     system-wide timezone of the local system that is used by
  68     applications for presentation to the user. It should be an
  69     absolute or relative symbolic link pointing to
  70     <filename>/usr/share/zoneinfo/</filename>, followed by a timezone
  71     identifier such as <literal>Europe/Berlin</literal> or
  72     <literal>Etc/UTC</literal>. The resulting link should lead to the
  73     corresponding binary
  74     <citerefentry project='man-pages'><refentrytitle>tzfile</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  75     timezone data for the configured timezone.</para>
  76
  77     <para>Because the timezone identifier is extracted from the
  78     symlink target name of <filename>/etc/localtime</filename>, this
  79     file may not be a normal file or hardlink.</para>
  80
  81     <para>The timezone may be overridden for individual programs by
  82     using the <varname>$TZ</varname> environment variable. See
  83     <citerefentry project='man-pages'><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
  84
  85     <para>You may use
  86     <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  87     to change the settings of this file from the command line during
  88     runtime. Use
  89     <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  90     to initialize the time zone on mounted (but not booted) system
  91     images.</para>
  92   </refsect1>
  93
  94   <refsect1>
  95       <title>See Also</title>
  96       <para>
  97         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  98         <citerefentry project='man-pages'><refentrytitle>tzset</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  99         <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
 100         <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 101         <citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 102         <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 103       </para>
 104   </refsect1>
 105
 106 </refentry>