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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="halt"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>halt</title>
<productname>systemd</productname>
</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. 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>
<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 basic 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>
<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>
<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>
|
