nspawn: free global variables before exiting

[thirdparty/systemd.git] / man / halt.xml

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

<!--
  SPDX-License-Identifier: LGPL-2.1+

  This file is part of systemd.

  Copyright 2010 Lennart Poettering
-->

<refentry id="halt"
    xmlns:xi="http://www.w3.org/2001/XInclude">

  <refentryinfo>
    <title>halt</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>halt</refentrytitle>
    <manvolnum>8</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>halt</refname>
    <refname>poweroff</refname>
    <refname>reboot</refname>
    <refpurpose>Halt, power-off or reboot the machine</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>halt</command>
      <arg choice="opt" rep="repeat">OPTIONS</arg>
    </cmdsynopsis>
    <cmdsynopsis>
      <command>poweroff</command>
      <arg choice="opt" rep="repeat">OPTIONS</arg>
    </cmdsynopsis>
    <cmdsynopsis>
      <command>reboot</command>
      <arg choice="opt" rep="repeat">OPTIONS</arg>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para><command>halt</command>, <command>poweroff</command>,
    <command>reboot</command> may be used to halt, power-off or reboot
    the machine.</para>

  </refsect1>

  <refsect1>
    <title>Options</title>

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

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

        <xi:include href="standard-options.xml" xpointer="help-text" />
      </varlistentry>

      <varlistentry>
        <term><option>--halt</option></term>

        <listitem><para>Halt the machine, regardless of which one of
        the three commands is invoked.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>-p</option></term>
        <term><option>--poweroff</option></term>

        <listitem><para>Power-off the machine, regardless of which one
        of the three commands is invoked.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>--reboot</option></term>

        <listitem><para>Reboot the machine, regardless of which one of
        the three commands is invoked.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>-f</option></term>
        <term><option>--force</option></term>

        <listitem><para>Force immediate halt, power-off, or reboot. When
        specified once, this results in an immediate but clean shutdown
        by the system manager. When specified twice, this results in an
        immediate shutdown without contacting the system manager. See the
        description of <option>--force</option> in
        <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
        for more details.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>-w</option></term>
        <term><option>--wtmp-only</option></term>

        <listitem><para>Only write wtmp shutdown entry, do not
        actually halt, power-off, reboot.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>-d</option></term>
        <term><option>--no-wtmp</option></term>

        <listitem><para>Do not write wtmp shutdown
        entry.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>-n</option></term>
        <term><option>--no-sync</option></term>

        <listitem><para>Don't sync hard disks/storage media before
        halt, power-off, reboot.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>--no-wall</option></term>

        <listitem><para>Do not send wall message before halt,
        power-off, reboot.</para></listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

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

    <para>On success, 0 is returned, a non-zero failure code
    otherwise.</para>
  </refsect1>

  <refsect1>
    <title>Notes</title>

    <para>These commands are implemented in a way that preserves compatibility with
    the original SysV commands.
    <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
    verbs <command>halt</command>, <command>poweroff</command>,
    <command>reboot</command> provide the same functionality with some additional
    features.</para>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>shutdown</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
      <citerefentry project='man-pages'><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry>
    </para>
  </refsect1>

</refentry>