<?xml version='1.0'?> <!--*-nxml-*--> <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd"> <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> <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>