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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
SPDX-License-Identifier: LGPL-2.1+
Copyright 2012 Lennart Poettering
-->
<refentry id="hostnamectl" conditional='ENABLE_HOSTNAMED'
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>hostnamectl</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Lennart</firstname>
<surname>Poettering</surname>
<email>lennart@poettering.net</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>hostnamectl</refentrytitle>
<manvolnum>1</manvolnum>
</refmeta>
<refnamediv>
<refname>hostnamectl</refname>
<refpurpose>Control the system hostname</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>hostnamectl</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="req">COMMAND</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>hostnamectl</command> may be used to query and
change the system hostname and related settings.</para>
<para>This tool distinguishes three different hostnames: the
high-level "pretty" hostname which might include all kinds of
special characters (e.g. "Lennart's Laptop"), the static hostname
which is used to initialize the kernel hostname at boot (e.g.
"lennarts-laptop"), and the transient hostname which is a fallback
value received from network configuration. If a static hostname is
set, and is valid (something other than localhost), then the
transient hostname is not used.</para>
<para>Note that the pretty hostname has little restrictions on the characters and length used, while the static and
transient hostnames are limited to the usually accepted characters of Internet domain names, and 64 characters at
maximum (the latter being a Linux limitation).</para>
<para>The static hostname is stored in
<filename>/etc/hostname</filename>, see
<citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for more information. The pretty hostname, chassis type, and icon
name are stored in <filename>/etc/machine-info</filename>, see
<citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>Use
<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
to initialize the system host name for mounted (but not booted)
system images.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options are understood:</para>
<variablelist>
<varlistentry>
<term><option>--no-ask-password</option></term>
<listitem><para>Do not query the user for authentication for
privileged operations.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--static</option></term>
<term><option>--transient</option></term>
<term><option>--pretty</option></term>
<listitem><para>If <command>status</command> is invoked (or no explicit command is given) and one of these
switches is specified, <command>hostnamectl</command> will print out just this selected hostname.</para>
<para>If used with <command>set-hostname</command>, only the selected hostname(s) will be updated. When more
than one of these switches are specified, all the specified hostnames will be updated. </para></listitem>
</varlistentry>
<xi:include href="user-system-options.xml" xpointer="host" />
<xi:include href="user-system-options.xml" xpointer="machine" />
<xi:include href="standard-options.xml" xpointer="help" />
<xi:include href="standard-options.xml" xpointer="version" />
</variablelist>
</refsect1>
<refsect1>
<title>Commands</title>
<para>The following commands are understood:</para>
<variablelist>
<varlistentry>
<term><command>status</command></term>
<listitem><para>Show current system hostname and related information. If no command is specified,
this is the implied default.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>set-hostname <replaceable>NAME</replaceable></command></term>
<listitem><para>Set the system hostname to <replaceable>NAME</replaceable>. By default, this will alter the
pretty, the static, and the transient hostname alike; however, if one or more of <option>--static</option>,
<option>--transient</option>, <option>--pretty</option> are used, only the selected hostnames are changed. If
the pretty hostname is being set, and static or transient are being set as well, the specified hostname will be
simplified in regards to the character set used before the latter are updated. This is done by removing special
characters and spaces. This ensures that the pretty and the static hostname are always closely related while
still following the validity rules of the specific name. This simplification of the hostname string is not done
if only the transient and/or static host names are set, and the pretty host name is left untouched.</para>
<para>Pass the empty string <literal></literal> as the
hostname to reset the selected hostnames to their default
(usually <literal>localhost</literal>).</para></listitem>
</varlistentry>
<varlistentry>
<term><command>set-icon-name <replaceable>NAME</replaceable></command></term>
<listitem><para>Set the system icon name to
<replaceable>NAME</replaceable>. The icon name is used by some
graphical applications to visualize this host. The icon name
should follow the <ulink
url="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">Icon
Naming Specification</ulink>.</para>
<para>Pass an empty string to reset the icon name to the
default value, which is determined from chassis type (see
below) and possibly other parameters.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>set-chassis <replaceable>TYPE</replaceable></command></term>
<listitem><para>Set the chassis type to
<replaceable>TYPE</replaceable>. The chassis type is used by
some graphical applications to visualize the host or alter
user interaction. Currently, the following chassis types are
defined:
<literal>desktop</literal>,
<literal>laptop</literal>,
<literal>convertible</literal>,
<literal>server</literal>,
<literal>tablet</literal>,
<literal>handset</literal>,
<literal>watch</literal>,
<literal>embedded</literal>,
as well as the special chassis types
<literal>vm</literal> and
<literal>container</literal> for virtualized systems that lack
an immediate physical chassis.</para>
<para>Pass an empty string to reset the chassis type to the
default value which is determined from the firmware and
possibly other parameters.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><command>set-deployment <replaceable>ENVIRONMENT</replaceable></command></term>
<listitem><para>Set the deployment environment description.
<replaceable>ENVIRONMENT</replaceable> must be a single word
without any control characters. One of the following is
suggested:
<literal>development</literal>,
<literal>integration</literal>,
<literal>staging</literal>,
<literal>production</literal>.
</para>
<para>Pass an empty string to reset to the default empty
value.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><command>set-location <replaceable>LOCATION</replaceable></command></term>
<listitem><para>Set the location string for the system, if it
is known. <replaceable>LOCATION</replaceable> should be a
human-friendly, free-form string describing the physical
location of the system, if it is known and applicable. This
may be as generic as <literal>Berlin, Germany</literal> or as
specific as <literal>Left Rack, 2nd Shelf</literal>.</para>
<para>Pass an empty string to reset to the default empty
value.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Exit status</title>
<para>On success, 0 is returned, a non-zero failure code
otherwise.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
|
