7871c8e932
For many usecases it is useful to store the chassis type somewhere, and /etc/machine-info sounds like a good place. Ideally we could always detect the chassis type from firmware, but frequently that's not available and in many embedded devices probably entirely unrealistic. This patch adds a configurable setting CHASSIS= to /etc/machine-info and exposes this via hostnamectl/hostnamed. hostnamed will guess the chassis type from DMI if nothing is set explicitly. I also added support for detecting it from ACPI, which should be more useful as ACPI 5.0 actually knows a "tablet" chassis type, which neither DMI nor previous ACPI versions knew. This also enables DMI-based and ACPI-based detection for non-x86 systems as ACPI is apparently coming to ARM platforms soon. I tried to minimize the vocabulary of chassis types understood and added: desktop, laptop, server, tablet, handset. This is much less than either APCI or DMI know. If we need more types later on we can easily add them.
255 lines
12 KiB
XML
255 lines
12 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">
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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 <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>
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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 host
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names: the high-level "pretty" hostname which might
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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 host name 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 host name, 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>--help</option></term>
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<term><option>-h</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>Don't 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>-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 @,
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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>set-hostname</command> is
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invoked and one or more of these
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options are passed only the selected
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hostnames is
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updated.</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 host
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name will be simplified in regards to
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the character set used before the
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latter are updated. This is done by
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replacing spaces by "-" and removing
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special characters. This ensures that
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the pretty and the static hostname
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are 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 "" as hostname to reset the
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selected hostnames to their default
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(usually
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"localhost").</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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