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aefdc1124f
As I noticed a lot of missing information when trying to implement checking
for missing info. I reimplemented the version information script to be more
robust, and here is the result.
Follow up to ec07c3c80b
228 lines
10 KiB
XML
228 lines
10 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
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<!ENTITY % entities SYSTEM "custom-entities.ent" >
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%entities;
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]>
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="hostnamectl" conditional='ENABLE_HOSTNAMED'
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>hostnamectl</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>hostnamectl</refentrytitle>
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<manvolnum>1</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>hostnamectl</refname>
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<refpurpose>Control the system hostname</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>hostnamectl</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="req">COMMAND</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>hostnamectl</command> may be used to query and change the system hostname and related
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settings.</para>
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<para><citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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and this tool distinguish three different hostnames: the high-level "pretty" hostname which might include
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all kinds of special characters (e.g. "Lennart's Laptop"), the "static" hostname which is the
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user-configured hostname (e.g. "lennarts-laptop"), and the transient hostname which is a fallback value
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received from network configuration (e.g. "node12345678"). If a static hostname is set to a valid value,
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then the transient hostname is not used.</para>
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<para>Note that the pretty hostname has little restrictions on the characters and length used, while the static and
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transient hostnames are limited to the usually accepted characters of Internet domain names, and 64 characters at
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maximum (the latter being a Linux limitation).</para>
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<para>Use
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry> to
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initialize the system hostname for mounted (but not booted) system images.</para>
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</refsect1>
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<refsect1>
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<title>Commands</title>
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<para>The following commands are understood:</para>
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<variablelist>
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<varlistentry>
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<term><command>status</command></term>
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<listitem><para>Show system hostname and related information. If no command is specified,
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this is the implied default.</para>
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<xi:include href="version-info.xml" xpointer="v195"/></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>hostname</command> [<replaceable>NAME</replaceable>]</term>
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<listitem><para>If no argument is given, print the system hostname. If an
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optional argument <replaceable>NAME</replaceable> is provided then the command changes the
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system hostname to <replaceable>NAME</replaceable>. By default, this will alter the
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pretty, the static, and the transient hostname alike; however, if one or more of <option>--static</option>,
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<option>--transient</option>, <option>--pretty</option> are used, only the selected hostnames are changed. If
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the pretty hostname is being set, and static or transient are being set as well, the specified hostname will be
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simplified in regards to the character set used before the latter are updated. This is done by removing special
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characters and spaces. This ensures that the pretty and the static hostname are always closely related while
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still following the validity rules of the specific name. This simplification of the hostname string is not done
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if only the transient and/or static hostnames are set, and the pretty hostname is left untouched.</para>
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<para>The static and transient hostnames must each be either a single DNS label (a string composed of
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7-bit ASCII lower-case characters and no spaces or dots, limited to the format allowed for DNS domain
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name labels), or a sequence of such labels separated by single dots that forms a valid DNS FQDN. The
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hostname must be at most 64 characters, which is a Linux limitation (DNS allows longer names).</para>
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<xi:include href="version-info.xml" xpointer="v249"/></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>icon-name</command> [<replaceable>NAME</replaceable>]</term>
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<listitem><para>If no argument is given, print the icon name of the system. If an
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optional argument <replaceable>NAME</replaceable> is provided then the command changes the
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icon name to <replaceable>NAME</replaceable>. The icon name is used by some
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graphical applications to visualize this host. The icon name
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should follow the <ulink
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url="https://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">Icon
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Naming Specification</ulink>.</para>
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<xi:include href="version-info.xml" xpointer="v249"/></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>chassis</command> [<replaceable>TYPE</replaceable>]</term>
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<listitem><para>If no argument is given, print the chassis type. If an
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optional argument <replaceable>TYPE</replaceable> is provided then the command changes the
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chassis type to <replaceable>TYPE</replaceable>. The chassis type is used by
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some graphical applications to visualize the host or alter user interaction.
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Currently, the following chassis types are defined:
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<literal>desktop</literal>,
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<literal>laptop</literal>,
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<literal>convertible</literal>,
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<literal>server</literal>,
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<literal>tablet</literal>,
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<literal>handset</literal>,
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<literal>watch</literal>,
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<literal>embedded</literal>,
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as well as the special chassis types
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<literal>vm</literal> and
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<literal>container</literal> for virtualized systems that lack
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an immediate physical chassis.</para>
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<xi:include href="version-info.xml" xpointer="v249"/>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><command>deployment</command> [<replaceable>ENVIRONMENT</replaceable>]</term>
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<listitem><para>If no argument is given, print the deployment environment. If an
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optional argument <replaceable>ENVIRONMENT</replaceable> is provided then the command changes the
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deployment environment to <replaceable>ENVIRONMENT</replaceable>.
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Argument <replaceable>ENVIRONMENT</replaceable>
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must be a single word without any control characters. One of the following is suggested:
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<literal>development</literal>,
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<literal>integration</literal>,
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<literal>staging</literal>,
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<literal>production</literal>.
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</para>
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<xi:include href="version-info.xml" xpointer="v249"/>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><command>location</command> [<replaceable>LOCATION</replaceable>]</term>
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<listitem><para>If no argument is given, print the location string for the system. If an
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optional argument <replaceable>LOCATION</replaceable> is provided then the command changes the
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location string for the system to <replaceable>LOCATION</replaceable>.
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Argument <replaceable>LOCATION</replaceable> should be a
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human-friendly, free-form string describing the physical
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location of the system, if it is known and applicable. This
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may be as generic as <literal>Berlin, Germany</literal> or as
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specific as <literal>Left Rack, 2nd Shelf</literal>.</para>
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<xi:include href="version-info.xml" xpointer="v249"/>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>The following options are understood:</para>
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<variablelist>
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<varlistentry>
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<term><option>--no-ask-password</option></term>
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<listitem><para>Do not query the user for authentication for
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privileged operations.</para>
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<xi:include href="version-info.xml" xpointer="v195"/></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--static</option></term>
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<term><option>--transient</option></term>
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<term><option>--pretty</option></term>
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<listitem><para>If <command>status</command> is invoked (or no explicit command is given) and one of these
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switches is specified, <command>hostnamectl</command> will print out just this selected hostname.</para>
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<para>If used with <command>hostname</command>, only the selected hostnames will be updated. When more
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than one of these switches are specified, all the specified hostnames will be updated. </para>
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<xi:include href="version-info.xml" xpointer="v195"/></listitem>
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</varlistentry>
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<xi:include href="user-system-options.xml" xpointer="host" />
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<xi:include href="user-system-options.xml" xpointer="machine" />
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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<xi:include href="standard-options.xml" xpointer="json" />
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Exit status</title>
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<para>On success, 0 is returned, a non-zero failure code
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otherwise.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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