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Existing --pretty, --transient, --static options, used previously for 'set-hostname' verb, are reused for the 'status' verb. If one of them is given, only the specified hostname is printed. This way there's no need to employ awk to get the hostname in a script.
275 lines
13 KiB
XML
275 lines
13 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="hostnamectl" conditional='ENABLE_HOSTNAMED'>
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<refentryinfo>
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<title>hostnamectl</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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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
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query and change the system hostname and related
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settings.</para>
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<para>This tool distinguishes three different
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hostnames: the high-level "pretty" hostname which
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might include all kinds of special characters
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(e.g. "Lennart's Laptop"), the static hostname which
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is used to initialize the kernel hostname at boot
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(e.g. "lennarts-laptop"), and the transient hostname
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which might be assigned temporarily due to network
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configuration and might revert back to the static
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hostname if network connectivity is lost and is only
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temporarily written to the kernel hostname
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(e.g. "dhcp-47-11").</para>
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<para>Note that the pretty hostname has little
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restrictions on the characters used, while the static
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and transient hostnames are limited to the usually
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accepted characters of Internet domain names.</para>
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<para>The static hostname is stored in
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<filename>/etc/hostname</filename>, see
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<citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for more information. The pretty hostname, chassis
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type, and icon name are stored in
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<filename>/etc/machine-info</filename>, see
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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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>-h</option></term>
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<term><option>--help</option></term>
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<listitem><para>Prints a short help
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text and exits.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem><para>Prints a short version
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string and exits.</para></listitem>
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</varlistentry>
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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
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for authentication for privileged
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operations.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-P</option></term>
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<term><option>--privileged</option></term>
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<listitem><para>Acquire privileges via PolicyKit
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before executing the operation.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-H</option></term>
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<term><option>--host</option></term>
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<listitem><para>Execute the operation
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remotely. Specify a hostname, or
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username and hostname separated by <literal>@</literal>,
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to connect to. This will use SSH to
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talk to a remote
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system.</para></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
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<command>status</command> is used (or
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no explicit command is given) and one
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of those fields is given,
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<command>hostnamectl</command> will
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print out just this selected
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hostname.</para>
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<para>If used with
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<command>set-hostname</command>, only
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the selected hostname(s) will be
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updated. When more than one of those
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options is used, all the specified
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hostnames will be updated.
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</para></listitem>
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</varlistentry>
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</variablelist>
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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 current system
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hostname and related
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information.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>set-hostname [NAME]</command></term>
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<listitem><para>Set the system
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hostname. By default, this will alter
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the pretty, the static, and the
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transient hostname alike; however, if
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one or more of
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<option>--static</option>,
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<option>--transient</option>,
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<option>--pretty</option> are used,
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only the selected hostnames are
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changed. If the pretty hostname is
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being set, and static or transient are
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being set as well, the specified
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hostname will be simplified in regards
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to the character set used before the
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latter are updated. This is done by
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replacing spaces with
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<literal>-</literal> and removing
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special characters. This ensures that
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the pretty and the static hostname are
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always closely related while still
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following the validity rules of the
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specific name. This simplification of
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the hostname string is not done if
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only the transient and/or static host
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names are set, and the pretty host
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name is left untouched. Pass the empty
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string <literal></literal> as the
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hostname to reset the selected
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hostnames to their default (usually
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<literal>localhost</literal>).</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>set-icon-name [NAME]</command></term>
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<listitem><para>Set the system icon
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name. The icon name is used by some
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graphical applications to visualize
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this host. The icon name should follow
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the <ulink
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url="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">Icon
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Naming Specification</ulink>. Pass an
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empty string to this operation to
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reset the icon name to the default
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value, which is determined from chassis
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type (see below) and possibly other
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parameters.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>set-chassis [TYPE]</command></term>
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<listitem><para>Set the chassis
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type. The chassis type is used by some
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graphical applications to visualize
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the host or alter user
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interaction. Currently, the following
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chassis types are defined:
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<literal>desktop</literal>,
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<literal>laptop</literal>,
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<literal>server</literal>,
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<literal>tablet</literal>,
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<literal>handset</literal>, as well as
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the special chassis types
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<literal>vm</literal> and
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<literal>container</literal> for
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virtualized systems that lack an
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immediate physical chassis. Pass an
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empty string to this operation to
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reset the chassis type to the default
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value which is determined from the
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firmware and possibly other
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parameters.</para></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>Exit status</title>
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<para>On success 0 is returned, a non-zero failure
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code 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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</para>
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</refsect1>
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</refentry>
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