systemd/man/machine-info.xml

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<refentry id="machine-info">
        <refentryinfo>
                <title>machine-info</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>machine-info</refentrytitle>
                <manvolnum>5</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>machine-info</refname>
                <refpurpose>Local machine information file</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <para><filename>/etc/machine-info</filename></para>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para>The <filename>/etc/machine-info</filename> file
                contains machine metadata.</para>

                <para>The basic file format of
                <filename>machine-info</filename> is a
                newline-separated list of environment-like
                shell-compatible variable assignments. It is possible
                to source the configuration from shell scripts,
                however, beyond mere variable assignments no shell
                features are supported, allowing applications to read
                the file without implementing a shell compatible
                execution engine.</para>

                <para><filename>/etc/machine-info</filename> contains
                metadata about the machine that is set by the user or
                administrator.</para>

                <para>Depending on the operating system other
                configuration files might be checked for machine
                information as well, however only as fallback.</para>

                <para>You may use
                <citerefentry><refentrytitle>hostnamectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                to change the settings of this file from the command
                line.</para>
        </refsect1>

        <refsect1>
                <title>Options</title>

                <para>The following machine metadata parameters may
                be set using
                <filename>/etc/machine-info</filename>:</para>

                <variablelist>

                        <varlistentry>
                                <term><varname>PRETTY_HOSTNAME=</varname></term>

                                <listitem><para>A pretty
                                human-readable UTF-8 machine identifier
                                string. This should contain a name
                                like <literal>Lennart's
                                Laptop</literal> which is useful to
                                present to the user and does not
                                suffer by the syntax limitations of
                                internet domain names. If possible, the
                                internet hostname as configured in
                                <filename>/etc/hostname</filename>
                                should be kept similar to this
                                one. Example: if this value is
                                <literal>Lennart's Computer</literal>
                                an Internet hostname of
                                <literal>lennarts-computer</literal>
                                might be a good choice. If this
                                parameter is not set, an application
                                should fall back to the Internet host
                                name for presentation
                                purposes.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>ICON_NAME=</varname></term>

                                <listitem><para>An icon identifying
                                this machine according to the <ulink
                                url="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">XDG
                                Icon Naming Specification</ulink>. If
                                this parameter is not set, an
                                application should fall back to
                                <literal>computer</literal> or a
                                similar icon name.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><varname>CHASSIS=</varname></term>

                                <listitem><para>The chassis
                                type. 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. Note that
                                many systems allow detection of the
                                chassis type automatically (based on
                                firmware information or
                                suchlike). This setting (if set) shall
                                take precedence over automatically
                                detected information and is useful to
                                override misdetected configuration or
                                to manually configure the chassis type
                                where automatic detection is not
                                available.</para></listitem>
                        </varlistentry>

                </variablelist>

        </refsect1>

        <refsect1>
                <title>Example</title>

                <programlisting>PRETTY_HOSTNAME="Lennart's Tablet"
ICON_NAME=computer-tablet
CHASSIS=tablet</programlisting>
        </refsect1>

        <refsect1>
                  <title>See Also</title>
                  <para>
                          <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>hostnamectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                          <citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                  </para>
        </refsect1>

</refentry>