man/systemd-detect-virt.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">
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   8   Copyright 2010 Lennart Poettering
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  23
  24 <refentry id="systemd-detect-virt">
  25
  26         <refentryinfo>
  27                 <title>systemd-detect-virt</title>
  28                 <productname>systemd</productname>
  29
  30                 <authorgroup>
  31                         <author>
  32                                 <contrib>Developer</contrib>
  33                                 <firstname>Lennart</firstname>
  34                                 <surname>Poettering</surname>
  35                                 <email>lennart@poettering.net</email>
  36                         </author>
  37                 </authorgroup>
  38         </refentryinfo>
  39
  40         <refmeta>
  41                 <refentrytitle>systemd-detect-virt</refentrytitle>
  42                 <manvolnum>1</manvolnum>
  43         </refmeta>
  44
  45         <refnamediv>
  46                 <refname>systemd-detect-virt</refname>
  47                 <refpurpose>Detect execution in a virtualized environment</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <cmdsynopsis>
  52                         <command>systemd-detect-virt <arg choice="opt" rep="repeat">OPTIONS</arg></command>
  53                 </cmdsynopsis>
  54         </refsynopsisdiv>
  55
  56         <refsect1>
  57                 <title>Description</title>
  58
  59                 <para><command>systemd-detect-virt</command> detects
  60                 execution in a virtualized environment. It identifies
  61                 the virtualization technology and can distuingish full
  62                 VM virtualization from container
  63                 virtualization.</para>
  64
  65                 <para>When executed without <option>--quiet</option>
  66                 will print a short identifier for the detected
  67                 virtualization technology. The following technologies
  68                 are currently identified: <varname>qemu</varname>,
  69                 <varname>kvm</varname>, <varname>vmware</varname>,
  70                 <varname>microsoft</varname>,
  71                 <varname>oracle</varname>, <varname>xen</varname>,
  72                 <varname>bochs</varname>, <varname>chroot</varname>,
  73                 <varname>openvz</varname>, <varname>lxc</varname>,
  74                 <varname>lxc-libvirt</varname>,
  75                 <varname>systemd-nspawn</varname>.</para>
  76
  77                 <para>If multiple virtualization solutions are used
  78                 only the "innermost" is detected and identified. That
  79                 means if both VM virtualization and container
  80                 virtualization are used in conjunction only the latter
  81                 will be identified (unless <option>--vm</option> is
  82                 passed).</para>
  83         </refsect1>
  84
  85         <refsect1>
  86                 <title>Options</title>
  87
  88                 <para>The following options are understood:</para>
  89
  90                 <variablelist>
  91                         <varlistentry>
  92                                 <term><option>-h</option></term>
  93                                 <term><option>--help</option></term>
  94
  95                                 <listitem><para>Prints a short help
  96                                 text and exits.</para></listitem>
  97                         </varlistentry>
  98
  99                         <varlistentry>
 100                                 <term><option>--version</option></term>
 101
 102                                 <listitem><para>Prints a short version
 103                                 string and exits.</para></listitem>
 104                         </varlistentry>
 105
 106                         <varlistentry>
 107                                 <term><option>-c</option></term>
 108                                 <term><option>--container</option></term>
 109
 110                                 <listitem><para>Only detects container
 111                                 virtualization (i.e. shared kernel
 112                                 virtualization).</para></listitem>
 113                         </varlistentry>
 114
 115                         <varlistentry>
 116                                 <term><option>-v</option></term>
 117                                 <term><option>--vm</option></term>
 118
 119                                 <listitem><para>Only detects VM
 120                                 virtualization (i.e. full hardware
 121                                 virtualization).</para></listitem>
 122                         </varlistentry>
 123
 124                         <varlistentry>
 125                                 <term><option>-q</option></term>
 126                                 <term><option>--quiet</option></term>
 127
 128                                 <listitem><para>Suppress output of the
 129                                 virtualization technology
 130                                 identifier.</para></listitem>
 131                         </varlistentry>
 132
 133                 </variablelist>
 134
 135         </refsect1>
 136
 137         <refsect1>
 138                 <title>Exit status</title>
 139
 140                 <para>If a virtualization technology is detected 0 is
 141                 returned, a non-zero code otherwise.</para>
 142         </refsect1>
 143
 144         <refsect1>
 145                 <title>See Also</title>
 146                 <para>
 147                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 148                 </para>
 149         </refsect1>
 150
 151 </refentry>