<?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="shutdown"> <refentryinfo> <title>shutdown</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>shutdown</refentrytitle> <manvolnum>8</manvolnum> </refmeta> <refnamediv> <refname>shutdown</refname> <refpurpose>Halt, power-off or reboot the machine</refpurpose> </refnamediv> <refsynopsisdiv> <cmdsynopsis> <command>shutdown <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt">TIME</arg> <arg choice="opt" rep="repeat">WALL</arg></command> </cmdsynopsis> </refsynopsisdiv> <refsect1> <title>Description</title> <para><command>shutdown</command> may be used to halt, power-off or reboot the machine.</para> <para>The first argument may be a time string (which is usually <literal>now</literal>). Optionally, this may be followed by a wall message to be sent to all logged-in users before going down.</para> <para>The time string may either be in the format <literal>hh:mm</literal> for hour/minutes specifying the time to execute the shutdown at, specified in 24h clock format. Alternatively it may be in the syntax <literal>+m</literal> referring to the specified number of minutes m from now. <literal>now</literal> is an alias for <literal>+0</literal>, i.e. for triggering an immediate shutdown. If no time argument is specified, <literal>+1</literal> is implied.</para> <para>Note that to specify a wall message you must specify a time argument, too.</para> <para>If the time argument is used, 5 minutes before the system goes down the <filename>/run/nologin</filename> file is created to ensure that further logins shall not be allowed.</para> </refsect1> <refsect1> <title>Options</title> <para>The following options are understood:</para> <variablelist> <varlistentry> <term><option>--help</option></term> <listitem><para>Prints a short help text and exits.</para></listitem> </varlistentry> <varlistentry> <term><option>-H</option></term> <term><option>--halt</option></term> <listitem><para>Halt the machine.</para></listitem> </varlistentry> <varlistentry> <term><option>-P</option></term> <term><option>--poweroff</option></term> <listitem><para>Power-off the machine (the default).</para></listitem> </varlistentry> <varlistentry> <term><option>-r</option></term> <term><option>--reboot</option></term> <listitem><para>Reboot the machine.</para></listitem> </varlistentry> <varlistentry> <term><option>-h</option></term> <listitem><para>Equivalent to <option>--poweroff</option>, unless <option>--halt</option> is specified.</para></listitem> </varlistentry> <varlistentry> <term><option>-k</option></term> <listitem><para>Do not halt, power-off, reboot, just write wall message.</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> <varlistentry> <term><option>-c</option></term> <listitem><para>Cancel a pending shutdown. This may be used cancel the effect of an invocation of <command>shutdown</command> with a time argument that is not <literal>+0</literal> or <literal>now</literal>.</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>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>halt</refentrytitle><manvolnum>8</manvolnum></citerefentry>, <citerefentry><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry> </para> </refsect1> </refentry>