1 <?xml version='1.0'?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
6 This file is part of systemd.
8 Copyright 2012 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 <refentry id="systemd-machine-id-setup">
27 <title>systemd-machine-id-setup</title>
28 <productname>systemd</productname>
32 <contrib>Developer</contrib>
33 <firstname>Lennart</firstname>
34 <surname>Poettering</surname>
35 <email>lennart@poettering.net</email>
41 <refentrytitle>systemd-machine-id-setup</refentrytitle>
42 <manvolnum>1</manvolnum>
46 <refname>systemd-machine-id-setup</refname>
47 <refpurpose>Initialize the machine ID in <filename>/etc/machine-id</filename></refpurpose>
52 <command>systemd-machine-id-setup</command>
57 <title>Description</title>
59 <para><command>systemd-machine-id-setup</command> may
60 be used by system installer tools to initialize the
62 <filename>/etc/machine-id</filename> at install time
63 with a randomly generated ID. See
64 <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
65 for more information about this file.</para>
67 <para>This tool will execute no operation if
68 <filename>/etc/machine-id</filename> is already
71 <para>If a valid D-Bus machine ID is already
72 configured for the system the D-Bus machine ID is
73 copied and used to initialize the machine ID in
74 <filename>/etc/machine-id</filename>.</para>
76 <para>If run inside a KVM virtual machine and a UUID
77 is passed via the <option>-uuid</option> option this
78 UUID is used to initialize the machine ID instead of a
79 randomly generated one. The caller must ensure that the
80 UUID passed is sufficiently unique and is different
81 for every booted instanced of the VM.</para>
83 <para>Similar, if run inside a Linux container
84 environment and a UUID is set for the container this
85 is used to initialize the machine ID. For details see
86 the documentation of the <ulink
87 url="http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface">Container
88 Interface</ulink>.</para>
93 <title>Options</title>
95 <para>This tool does not take any options or arguments.</para>
99 <title>Exit status</title>
101 <para>On success 0 is returned, a non-zero failure
102 code otherwise.</para>
106 <title>See Also</title>
108 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
109 <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
110 <citerefentry><refentrytitle>dbus-uuidgen</refentrytitle><manvolnum>1</manvolnum></citerefentry>