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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">
<!--
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="hostnamectl" conditional='ENABLE_HOSTNAMED'>
<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 might be assigned temporarily due to network
configuration and might revert back to the static
hostname if network connectivity is lost and is only
temporarily written to the kernel hostname
(e.g. "dhcp-47-11").</para>
<para>Note that the pretty hostname has little
restrictions on the characters used, while the static
and transient hostnames are limited to the usually
accepted characters of Internet domain names.</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-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The following options are understood:</para>
<variablelist>
<varlistentry>
<term><option>-h</option></term>
<term><option>--help</option></term>
<listitem><para>Prints a short help
text and exits.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--version</option></term>
<listitem><para>Prints a short version
string and exits.</para></listitem>
</varlistentry>
<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>-P</option></term>
<term><option>--privileged</option></term>
<listitem><para>Acquire privileges via PolicyKit
before executing the operation.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-H</option></term>
<term><option>--host</option></term>
<listitem><para>Execute the operation
remotely. Specify a hostname, or
username and hostname separated by <literal>@</literal>,
to connect to. This will use SSH to
talk to the remote
system.</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 used (or
no explicit command is given) and one
of those fields is given,
<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 those
options is used, all the specified
hostnames will be updated.
</para></listitem>
</varlistentry>
</variablelist>
<para>The following commands are understood:</para>
<variablelist>
<varlistentry>
<term><command>status</command></term>
<listitem><para>Show current system
hostname and related
information.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>set-hostname [NAME]</command></term>
<listitem><para>Set the system
hostname. 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
replacing spaces with
<literal>-</literal> and removing
special characters. 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. 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 [NAME]</command></term>
<listitem><para>Set the system icon
name. 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>. Pass an
empty string to this operation 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 [TYPE]</command></term>
<listitem><para>Set the chassis
type. 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>server</literal>,
<literal>tablet</literal>,
<literal>handset</literal>, as well as
the special chassis types
<literal>vm</literal> and
<literal>container</literal> for
virtualized systems that lack an
immediate physical chassis. Pass an
empty string to this operation to
reset the chassis type to the default
value which is determined from the
firmware and possibly other
parameters.</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>
</para>
</refsect1>
</refentry>
|
