man/systemd-detect-virt.xml

<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

<!--
  This file is part of systemd.

  Copyright 2010 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->

<refentry id="systemd-detect-virt">

        <refentryinfo>
                <title>systemd-detect-virt</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>systemd-detect-virt</refentrytitle>
                <manvolnum>1</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd-detect-virt</refname>
                <refpurpose>Detect execution in a virtualized environment</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <cmdsynopsis>
                        <command>systemd-detect-virt <arg choice="opt" rep="repeat">OPTIONS</arg></command>
                </cmdsynopsis>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para><command>systemd-detect-virt</command> detects
                execution in a virtualized environment. It identifies
                the virtualization technology and can distuingish full
                VM virtualization from container
                virtualization.</para>

                <para>When executed without <option>--quiet</option>
                will print a short identifier for the detected
                virtualization technology. The following technologies
                are currently identified: <varname>qemu</varname>,
                <varname>kvm</varname>, <varname>vmware</varname>,
                <varname>microsoft</varname>,
                <varname>oracle</varname>, <varname>xen</varname>,
                <varname>bochs</varname>, <varname>chroot</varname>,
                <varname>openvz</varname>, <varname>lxc</varname>,
                <varname>lxc-libvirt</varname>,
                <varname>systemd-nspawn</varname>.</para>

                <para>If multiple virtualization solutions are used
                only the "innermost" is detected and identified. That
                means if both VM virtualization and container
                virtualization are used in conjunction only the latter
                will be identified (unless <option>--vm</option> is
                passed).</para>
        </refsect1>

        <refsect1>
                <title>Options</title>

                <para>The following options are understood:</para>

                <variablelist>
                        <varlistentry>
                                <term><option>-h</option></term>
                                <term><option>--help</option></term>

                                <listitem><para>Prints a short help
                                text and exits.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--version</option></term>

                                <listitem><para>Prints a short version
                                string and exits.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>-c</option></term>
                                <term><option>--container</option></term>

                                <listitem><para>Only detects container
                                virtualization (i.e. shared kernel
                                virtualization).</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>-v</option></term>
                                <term><option>--vm</option></term>

                                <listitem><para>Only detects VM
                                virtualization (i.e. full hardware
                                virtualization).</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>-q</option></term>
                                <term><option>--quiet</option></term>

                                <listitem><para>Suppress output of the
                                virtualization technology
                                identifier.</para></listitem>
                        </varlistentry>

                </variablelist>

        </refsect1>

        <refsect1>
                <title>Exit status</title>

                <para>If a virtualization technology is detected 0 is
                returned, a non-zero code otherwise.</para>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                </para>
        </refsect1>

</refentry>