man/hostname.xml

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   3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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   7   This file is part of systemd.
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   9   Copyright 2010 Lennart Poettering
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  24
  25 <refentry id="hostname">
  26   <refentryinfo>
  27     <title>hostname</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>hostname</refentrytitle>
  42     <manvolnum>5</manvolnum>
  43   </refmeta>
  44
  45   <refnamediv>
  46     <refname>hostname</refname>
  47     <refpurpose>Local hostname configuration file</refpurpose>
  48   </refnamediv>
  49
  50   <refsynopsisdiv>
  51     <para><filename>/etc/hostname</filename></para>
  52   </refsynopsisdiv>
  53
  54   <refsect1>
  55     <title>Description</title>
  56
  57     <para>The <filename>/etc/hostname</filename> file configures the
  58     name of the local system that is set during boot using the
  59     <citerefentry><refentrytitle>sethostname</refentrytitle><manvolnum>2</manvolnum></citerefentry>
  60     system call. It should contain a single newline-terminated
  61     hostname string. The hostname may be a free-form string up to 64
  62     characters in length; however, it is recommended that it consists
  63     only of 7-bit ASCII lower-case characters and no spaces or dots,
  64     and limits itself to the format allowed for DNS domain name
  65     labels, even though this is not a strict requirement.</para>
  66
  67     <para>Depending on the operating system, other configuration files
  68     might be checked for configuration of the hostname as well,
  69     however only as fallback.</para>
  70
  71     <para>You may use
  72     <citerefentry><refentrytitle>hostnamectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  73     to change the value of this file during runtime from the command
  74     line. Use
  75     <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  76     to initialize it on mounted (but not booted) system images.</para>
  77   </refsect1>
  78
  79   <refsect1>
  80     <title>History</title>
  81
  82     <para>The simple configuration file format of
  83     <filename>/etc/hostname</filename> originates from Debian
  84     GNU/Linux.</para>
  85   </refsect1>
  86
  87   <refsect1>
  88       <title>See Also</title>
  89       <para>
  90         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  91         <citerefentry><refentrytitle>sethostname</refentrytitle><manvolnum>2</manvolnum></citerefentry>,
  92         <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  93         <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
  94         <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  95         <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  96         <citerefentry><refentrytitle>hostnamectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  97         <citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
  98         <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  99       </para>
 100   </refsect1>
 101
 102 </refentry>