man/hostnamectl.xml

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   7 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
   8
   9 <refentry id="hostnamectl" conditional='ENABLE_HOSTNAMED'
  10     xmlns:xi="http://www.w3.org/2001/XInclude">
  11
  12   <refentryinfo>
  13     <title>hostnamectl</title>
  14     <productname>systemd</productname>
  15   </refentryinfo>
  16
  17   <refmeta>
  18     <refentrytitle>hostnamectl</refentrytitle>
  19     <manvolnum>1</manvolnum>
  20   </refmeta>
  21
  22   <refnamediv>
  23     <refname>hostnamectl</refname>
  24     <refpurpose>Control the system hostname</refpurpose>
  25   </refnamediv>
  26
  27   <refsynopsisdiv>
  28     <cmdsynopsis>
  29       <command>hostnamectl</command>
  30       <arg choice="opt" rep="repeat">OPTIONS</arg>
  31       <arg choice="req">COMMAND</arg>
  32     </cmdsynopsis>
  33   </refsynopsisdiv>
  34
  35   <refsect1>
  36     <title>Description</title>
  37
  38     <para><command>hostnamectl</command> may be used to query and change the system hostname and related
  39     settings.</para>
  40
  41     <para><citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
  42     and this tool distinguish three different hostnames: the high-level "pretty" hostname which might include
  43     all kinds of special characters (e.g. "Lennart's Laptop"), the "static" hostname which is the
  44     user-configured hostname (e.g. "lennarts-laptop"), and the transient hostname which is a fallback value
  45     received from network configuration (e.g. "node12345678"). If a static hostname is set to a valid value,
  46     then the transient hostname is not used.</para>
  47
  48     <para>Note that the pretty hostname has little restrictions on the characters and length used, while the static and
  49     transient hostnames are limited to the usually accepted characters of Internet domain names, and 64 characters at
  50     maximum (the latter being a Linux limitation).</para>
  51
  52     <para>Use
  53     <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry> to
  54     initialize the system hostname for mounted (but not booted) system images.</para>
  55   </refsect1>
  56
  57   <refsect1>
  58     <title>Commands</title>
  59
  60     <para>The following commands are understood:</para>
  61
  62     <variablelist>
  63       <varlistentry>
  64         <term><command>status</command></term>
  65
  66         <listitem><para>Show system hostname and related information. If no command is specified,
  67         this is the implied default.</para>
  68
  69         <xi:include href="version-info.xml" xpointer="v195"/></listitem>
  70       </varlistentry>
  71
  72       <varlistentry>
  73         <term><command>hostname</command> [<replaceable>NAME</replaceable>]</term>
  74
  75         <listitem><para>If no argument is given, print the system hostname. If an
  76         optional argument <replaceable>NAME</replaceable> is provided then the command changes the
  77         system hostname to <replaceable>NAME</replaceable>. By default, this will alter the
  78         pretty, the static, and the transient hostname alike; however, if one or more of <option>--static</option>,
  79         <option>--transient</option>, <option>--pretty</option> are used, only the selected hostnames are changed. If
  80         the pretty hostname is being set, and static or transient are being set as well, the specified hostname will be
  81         simplified in regards to the character set used before the latter are updated. This is done by removing special
  82         characters and spaces. This ensures that the pretty and the static hostname are always closely related while
  83         still following the validity rules of the specific name. This simplification of the hostname string is not done
  84         if only the transient and/or static hostnames are set, and the pretty hostname is left untouched.</para>
  85
  86         <para>The static and transient hostnames must each be either a single DNS label (a string composed of
  87         7-bit ASCII lower-case characters and no spaces or dots, limited to the format allowed for DNS domain
  88         name labels), or a sequence of such labels separated by single dots that forms a valid DNS FQDN. The
  89         hostname must be at most 64 characters, which is a Linux limitation (DNS allows longer names).</para>
  90
  91         <xi:include href="version-info.xml" xpointer="v249"/></listitem>
  92       </varlistentry>
  93
  94       <varlistentry>
  95         <term><command>icon-name</command> [<replaceable>NAME</replaceable>]</term>
  96
  97         <listitem><para>If no argument is given, print the icon name of the system. If an
  98         optional argument <replaceable>NAME</replaceable> is provided then the command changes the
  99         icon name to <replaceable>NAME</replaceable>. The icon name is used by some
 100         graphical applications to visualize this host. The icon name
 101         should follow the <ulink
 102         url="https://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">Icon
 103         Naming Specification</ulink>.</para>
 104
 105         <xi:include href="version-info.xml" xpointer="v249"/></listitem>
 106       </varlistentry>
 107
 108       <varlistentry>
 109         <term><command>chassis</command> [<replaceable>TYPE</replaceable>]</term>
 110
 111         <listitem><para>If no argument is given, print the chassis type. If an
 112         optional argument <replaceable>TYPE</replaceable> is provided then the command changes the
 113         chassis type to <replaceable>TYPE</replaceable>. The chassis type is used by
 114         some graphical applications to visualize the host or alter user interaction.
 115         Currently, the following chassis types are defined:
 116         <literal>desktop</literal>,
 117         <literal>laptop</literal>,
 118         <literal>convertible</literal>,
 119         <literal>server</literal>,
 120         <literal>tablet</literal>,
 121         <literal>handset</literal>,
 122         <literal>watch</literal>,
 123         <literal>embedded</literal>,
 124         as well as the special chassis types
 125         <literal>vm</literal> and
 126         <literal>container</literal> for virtualized systems that lack
 127         an immediate physical chassis.</para>
 128
 129         <xi:include href="version-info.xml" xpointer="v249"/>
 130         </listitem>
 131       </varlistentry>
 132
 133       <varlistentry>
 134         <term><command>deployment</command> [<replaceable>ENVIRONMENT</replaceable>]</term>
 135
 136         <listitem><para>If no argument is given, print the deployment environment. If an
 137         optional argument <replaceable>ENVIRONMENT</replaceable> is provided then the command changes the
 138         deployment environment to <replaceable>ENVIRONMENT</replaceable>.
 139         Argument <replaceable>ENVIRONMENT</replaceable>
 140         must be a single word without any control characters. One of the following is suggested:
 141         <literal>development</literal>,
 142         <literal>integration</literal>,
 143         <literal>staging</literal>,
 144         <literal>production</literal>.
 145         </para>
 146
 147         <xi:include href="version-info.xml" xpointer="v249"/>
 148         </listitem>
 149       </varlistentry>
 150
 151       <varlistentry>
 152         <term><command>location</command> [<replaceable>LOCATION</replaceable>]</term>
 153
 154         <listitem><para>If no argument is given, print the location string for the system. If an
 155         optional argument <replaceable>LOCATION</replaceable> is provided then the command changes the
 156         location string for the system to <replaceable>LOCATION</replaceable>.
 157         Argument <replaceable>LOCATION</replaceable> should be a
 158         human-friendly, free-form string describing the physical
 159         location of the system, if it is known and applicable. This
 160         may be as generic as <literal>Berlin, Germany</literal> or as
 161         specific as <literal>Left Rack, 2nd Shelf</literal>.</para>
 162
 163         <xi:include href="version-info.xml" xpointer="v249"/>
 164         </listitem>
 165       </varlistentry>
 166     </variablelist>
 167   </refsect1>
 168
 169   <refsect1>
 170     <title>Options</title>
 171
 172     <para>The following options are understood:</para>
 173
 174     <variablelist>
 175       <varlistentry>
 176         <term><option>--no-ask-password</option></term>
 177
 178         <listitem><para>Do not query the user for authentication for
 179         privileged operations.</para>
 180
 181         <xi:include href="version-info.xml" xpointer="v195"/></listitem>
 182       </varlistentry>
 183
 184       <varlistentry>
 185         <term><option>--static</option></term>
 186         <term><option>--transient</option></term>
 187         <term><option>--pretty</option></term>
 188
 189         <listitem><para>If <command>status</command> is invoked (or no explicit command is given) and one of these
 190         switches is specified, <command>hostnamectl</command> will print out just this selected hostname.</para>
 191
 192         <para>If used with <command>hostname</command>, only the selected hostnames will be updated. When more
 193         than one of these switches are specified, all the specified hostnames will be updated. </para>
 194
 195         <xi:include href="version-info.xml" xpointer="v195"/></listitem>
 196       </varlistentry>
 197
 198       <xi:include href="user-system-options.xml" xpointer="host" />
 199       <xi:include href="user-system-options.xml" xpointer="machine" />
 200
 201       <xi:include href="standard-options.xml" xpointer="help" />
 202       <xi:include href="standard-options.xml" xpointer="version" />
 203       <xi:include href="standard-options.xml" xpointer="json" />
 204     </variablelist>
 205   </refsect1>
 206
 207   <refsect1>
 208     <title>Exit status</title>
 209
 210     <para>On success, 0 is returned, a non-zero failure code
 211     otherwise.</para>
 212   </refsect1>
 213
 214   <refsect1>
 215     <title>See Also</title>
 216     <para>
 217       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 218       <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 219       <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 220       <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 221       <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 222       <citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 223       <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 224     </para>
 225   </refsect1>
 226
 227 </refentry>