man/machine-info.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.
   8
   9   Copyright 2010 Lennart Poettering
  10
  11   systemd is free software; you can redistribute it and/or modify it
  12   under the terms of the GNU Lesser General Public License as published by
  13   the Free Software Foundation; either version 2.1 of the License, or
  14   (at your option) any later version.
  15
  16   systemd is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19   Lesser General Public License for more details.
  20
  21   You should have received a copy of the GNU Lesser General Public License
  22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  23 -->
  24
  25 <refentry id="machine-info">
  26         <refentryinfo>
  27                 <title>machine-info</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>machine-info</refentrytitle>
  42                 <manvolnum>5</manvolnum>
  43         </refmeta>
  44
  45         <refnamediv>
  46                 <refname>machine-info</refname>
  47                 <refpurpose>Local machine information file</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <para><filename>/etc/machine-info</filename></para>
  52         </refsynopsisdiv>
  53
  54         <refsect1>
  55                 <title>Description</title>
  56
  57                 <para>The <filename>/etc/machine-info</filename> file
  58                 contains machine meta data.</para>
  59
  60                 <para>The basic file format of
  61                 <filename>machine-info</filename> is a
  62                 newline-separated list of environment-like
  63                 shell-compatible variable assignments. It is possible
  64                 to source the configuration from shell scripts,
  65                 however, beyond mere variable assignments no shell
  66                 features are supported, allowing applications to read
  67                 the file without implementing a shell compatible
  68                 execution engine.</para>
  69
  70                 <para><filename>/etc/machine-info</filename> contains
  71                 meta data about the machine that is set by the user or
  72                 administrator.</para>
  73
  74                 <para>Depending on the operating system other
  75                 configuration files might be checked for machine
  76                 information as well, however only as fallback.</para>
  77
  78                 <para>You may use
  79                 <citerefentry><refentrytitle>hostnamectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  80                 to change the settings of this file from the command
  81                 line.</para>
  82         </refsect1>
  83
  84         <refsect1>
  85                 <title>Options</title>
  86
  87                 <para>The following machine meta data parameters may
  88                 be set using
  89                 <filename>/etc/machine-info</filename>:</para>
  90
  91                 <variablelist>
  92
  93                         <varlistentry>
  94                                 <term><varname>PRETTY_HOSTNAME=</varname></term>
  95
  96                                 <listitem><para>A pretty
  97                                 human-readable UTF-8 machine identifier
  98                                 string. This should contain a name
  99                                 like <literal>Lennart's
 100                                 Laptop</literal> which is useful to
 101                                 present to the user and does not
 102                                 suffer by the syntax limitations of
 103                                 internet domain names. If possible, the
 104                                 internet hostname as configured in
 105                                 <filename>/etc/hostname</filename>
 106                                 should be kept similar to this
 107                                 one. Example: if this value is
 108                                 <literal>Lennart's Computer</literal>
 109                                 an Internet hostname of
 110                                 <literal>lennarts-computer</literal>
 111                                 might be a good choice. If this
 112                                 parameter is not set, an application
 113                                 should fall back to the Internet host
 114                                 name for presentation
 115                                 purposes.</para></listitem>
 116                         </varlistentry>
 117
 118                         <varlistentry>
 119                                 <term><varname>ICON_NAME=</varname></term>
 120
 121                                 <listitem><para>An icon identifying
 122                                 this machine according to the <ulink
 123                                 url="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">XDG
 124                                 Icon Naming Specification</ulink>. If
 125                                 this parameter is not set, an
 126                                 application should fall back to
 127                                 <literal>computer</literal> or a
 128                                 similar icon name.</para></listitem>
 129                         </varlistentry>
 130
 131                         <varlistentry>
 132                                 <term><varname>CHASSIS=</varname></term>
 133
 134                                 <listitem><para>The chassis
 135                                 type. Currently, the following chassis
 136                                 types are defined:
 137                                 <literal>desktop</literal>,
 138                                 <literal>laptop</literal>,
 139                                 <literal>server</literal>,
 140                                 <literal>tablet</literal>,
 141                                 <literal>handset</literal>, as well as
 142                                 the special chassis types
 143                                 <literal>vm</literal> and
 144                                 <literal>container</literal> for
 145                                 virtualized systems that lack an
 146                                 immediate physical chassis. Note that
 147                                 many systems allow detection of the
 148                                 chassis type automatically (based on
 149                                 firmware information or
 150                                 suchlike). This setting (if set) shall
 151                                 take precedence over automatically
 152                                 detected information and is useful to
 153                                 override misdetected configuration or
 154                                 to manually configure the chassis type
 155                                 where automatic detection is not
 156                                 available.</para></listitem>
 157                         </varlistentry>
 158
 159                 </variablelist>
 160
 161         </refsect1>
 162
 163         <refsect1>
 164                 <title>Example</title>
 165
 166                 <programlisting>PRETTY_HOSTNAME="Lennart's Tablet"
 167 ICON_NAME=computer-tablet
 168 CHASSIS=tablet</programlisting>
 169         </refsect1>
 170
 171         <refsect1>
 172                   <title>See Also</title>
 173                   <para>
 174                           <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 175                           <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 176                           <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 177                           <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 178                           <citerefentry><refentrytitle>hostnamectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 179                           <citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 180                   </para>
 181         </refsect1>
 182
 183 </refentry>