man/systemd-machine-id-setup.xml

   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">
   4
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   6   This file is part of systemd.
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   8   Copyright 2012 Lennart Poettering
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  23
  24 <refentry id="systemd-machine-id-setup"
  25           xmlns:xi="http://www.w3.org/2001/XInclude">
  26
  27         <refentryinfo>
  28                 <title>systemd-machine-id-setup</title>
  29                 <productname>systemd</productname>
  30
  31                 <authorgroup>
  32                         <author>
  33                                 <contrib>Developer</contrib>
  34                                 <firstname>Lennart</firstname>
  35                                 <surname>Poettering</surname>
  36                                 <email>lennart@poettering.net</email>
  37                         </author>
  38                 </authorgroup>
  39         </refentryinfo>
  40
  41         <refmeta>
  42                 <refentrytitle>systemd-machine-id-setup</refentrytitle>
  43                 <manvolnum>1</manvolnum>
  44         </refmeta>
  45
  46         <refnamediv>
  47                 <refname>systemd-machine-id-setup</refname>
  48                 <refpurpose>Initialize the machine ID in /etc/machine-id</refpurpose>
  49         </refnamediv>
  50
  51         <refsynopsisdiv>
  52                 <cmdsynopsis>
  53                         <command>systemd-machine-id-setup</command>
  54                 </cmdsynopsis>
  55         </refsynopsisdiv>
  56
  57         <refsect1>
  58                 <title>Description</title>
  59
  60                 <para><command>systemd-machine-id-setup</command> may
  61                 be used by system installer tools to initialize the
  62                 machine ID stored in
  63                 <filename>/etc/machine-id</filename> at install time
  64                 with a randomly generated ID. See
  65                 <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  66                 for more information about this file.</para>
  67
  68                 <para>This tool will execute no operation if
  69                 <filename>/etc/machine-id</filename> is already
  70                 initialized.</para>
  71
  72                 <para>If a valid D-Bus machine ID is already
  73                 configured for the system, the D-Bus machine ID is
  74                 copied and used to initialize the machine ID in
  75                 <filename>/etc/machine-id</filename>.</para>
  76
  77                 <para>If run inside a KVM virtual machine and a UUID
  78                 is passed via the <option>-uuid</option> option, this
  79                 UUID is used to initialize the machine ID instead of a
  80                 randomly generated one. The caller must ensure that the
  81                 UUID passed is sufficiently unique and is different
  82                 for every booted instanced of the VM.</para>
  83
  84                 <para>Similar, if run inside a Linux container
  85                 environment and a UUID is set for the container this
  86                 is used to initialize the machine ID. For details see
  87                 the documentation of the <ulink
  88                 url="http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface">Container
  89                 Interface</ulink>.</para>
  90
  91                 <para>Use
  92                 <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  93                 to initialize the machine ID on mounted (but not
  94                 booted) system images.</para>
  95
  96         </refsect1>
  97
  98         <refsect1>
  99                 <title>Options</title>
 100
 101                 <para>The following options are understood:</para>
 102
 103                 <variablelist>
 104                         <varlistentry>
 105                                 <term><option>--root=<replaceable>root</replaceable></option></term>
 106                                 <listitem><para>Takes a directory path
 107                                 as an argument. All paths will be
 108                                 prefixed with the given alternate
 109                                 <replaceable>root</replaceable> path,
 110                                 including config search paths.
 111                                 </para></listitem>
 112                         </varlistentry>
 113                         <xi:include href="standard-options.xml" xpointer="help" />
 114                         <xi:include href="standard-options.xml" xpointer="version" />
 115                 </variablelist>
 116
 117         </refsect1>
 118
 119         <refsect1>
 120                 <title>Exit status</title>
 121
 122                 <para>On success, 0 is returned, a non-zero failure
 123                 code otherwise.</para>
 124         </refsect1>
 125
 126         <refsect1>
 127                 <title>See Also</title>
 128                 <para>
 129                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 130                         <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 131                         <citerefentry><refentrytitle>dbus-uuidgen</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 132                         <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 133                 </para>
 134         </refsect1>
 135
 136 </refentry>