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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"

"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">

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<refentry id="poweroff"

xmlns:xi="http://www.w3.org/2001/XInclude">

<refentryinfo>

<title>poweroff</title>

<productname>systemd</productname>

</refentryinfo>

<refmeta>

<refentrytitle>poweroff</refentrytitle>

<manvolnum>8</manvolnum>

</refmeta>

<refnamediv>

<refname>poweroff</refname>

<refname>reboot</refname>

<refname>halt</refname>

<refpurpose>Power off, reboot, or halt the machine</refpurpose>

</refnamediv>

<refsynopsisdiv>

<cmdsynopsis>

<command>poweroff</command>

<arg choice="opt" rep="repeat">OPTIONS</arg>

</cmdsynopsis>

<cmdsynopsis>

<command>reboot</command>

<arg choice="opt" rep="repeat">OPTIONS</arg>

</cmdsynopsis>

<cmdsynopsis>

<command>halt</command>

<arg choice="opt" rep="repeat">OPTIONS</arg>

</cmdsynopsis>

</refsynopsisdiv>

<refsect1>

<title>Description</title>

<para><command>poweroff</command>, <command>reboot</command>, and <command>halt</command> may be used to

power off, reboot, or halt the machine. All three commands take the same options.</para>

</refsect1>

<refsect1>

<title>Options</title>

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

<variablelist>

<varlistentry>

<term><option>--help</option></term>

<listitem>

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

<xi:include href="version-info.xml" xpointer="v253"/>

</listitem>

</varlistentry>

<varlistentry>

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

<listitem><para>Halt the machine, regardless of which one of

the three commands is invoked.</para>

<xi:include href="version-info.xml" xpointer="v253"/></listitem>

</varlistentry>

<varlistentry>

<term><option>-p</option></term>

<term><option>--poweroff</option></term>

<listitem><para>Power off the machine, when either <command>halt</command>

or <command>poweroff</command> is invoked. This option is ignored when

<command>reboot</command> is invoked.</para>

<xi:include href="version-info.xml" xpointer="v253"/></listitem>

</varlistentry>

<varlistentry>

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

<listitem><para>Reboot the machine, regardless of which one of

the three commands is invoked.</para>

<xi:include href="version-info.xml" xpointer="v253"/></listitem>

</varlistentry>

<varlistentry>

<term><option>-f</option></term>

<term><option>--force</option></term>

<listitem>

<para>Force immediate power-off, halt, or reboot. If specified, the command does not contact the

init system. In most cases, filesystems are not properly unmounted before shutdown. For example,

the command <command>reboot -f</command> is mostly equivalent to

<command>systemctl reboot -ff</command>, instead of <command>systemctl reboot -f</command>.

</para>

<xi:include href="version-info.xml" xpointer="v253"/>

</listitem>

</varlistentry>

<varlistentry>

<term><option>-w</option></term>

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

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

</para>

<xi:include href="version-info.xml" xpointer="v253"/></listitem>

</varlistentry>

<varlistentry>

<term><option>-d</option></term>

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

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

<xi:include href="version-info.xml" xpointer="v253"/></listitem>

</varlistentry>

<varlistentry>

<term><option>-n</option></term>

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

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

</para>

<xi:include href="version-info.xml" xpointer="v253"/></listitem>

</varlistentry>

<varlistentry>

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

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

<xi:include href="version-info.xml" xpointer="v253"/></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 basic compatibility with the original SysV

commands. <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>

verbs <command>poweroff</command>, <command>reboot</command>, <command>halt</command> provide the same

functionality with some additional features.</para>

<para>Note that on many SysV systems <command>halt</command> used to be synonymous to

<command>poweroff</command>, i.e. both commands would equally result in powering the machine off. systemd

is more accurate here, and <command>halt</command> results in halting the machine only (leaving power

on), and <command>poweroff</command> is required to actually power it off.</para>

</refsect1>

<refsect1>

<title>See Also</title>

<para><simplelist type="inline">

<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>

<member><citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>

<member><citerefentry><refentrytitle>shutdown</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>

<member><citerefentry project='man-pages'><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>

</simplelist></para>

</refsect1>

</refentry>