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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="shutdown"
+    xmlns:xi="http://www.w3.org/2001/XInclude">
+
+  <refentryinfo>
+    <title>shutdown</title>
+    <productname>systemd</productname>
+  </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</command>
+      <arg choice="opt" rep="repeat">OPTIONS</arg>
+      <arg choice="opt">TIME</arg>
+      <arg choice="opt" rep="repeat">WALL</arg>
+    </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>
+
+        <xi:include href="standard-options.xml" xpointer="help-text" />
+      </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
+        to 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 project='man-pages'><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>