chiark / gitweb /
6a4c1844a47ad819ca709d3e428c68c4fe87017c
[elogind.git] / shutdown.xml
1 <?xml version='1.0'?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
3         "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
4
5 <!--
6   This file is part of systemd.
7
8   Copyright 2010 Lennart Poettering
9
10   systemd is free software; you can redistribute it and/or modify it
11   under the terms of the GNU Lesser General Public License as published by
12   the Free Software Foundation; either version 2.1 of the License, or
13   (at your option) any later version.
14
15   systemd is distributed in the hope that it will be useful, but
16   WITHOUT ANY WARRANTY; without even the implied warranty of
17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18   Lesser General Public License for more details.
19
20   You should have received a copy of the GNU Lesser General Public License
21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 -->
23
24 <refentry id="shutdown"
25           xmlns:xi="http://www.w3.org/2001/XInclude">
26
27         <refentryinfo>
28                 <title>shutdown</title>
29                 <productname>systemd</productname>
30
31                 <authorgroup>
32                         <author>
33                                 <contrib>Developer</contrib>
34                                 <firstname>Lennart</firstname>
35                                 <surname>Poettering</surname>
36                                 <email>lennart@poettering.net</email>
37                         </author>
38                 </authorgroup>
39         </refentryinfo>
40
41         <refmeta>
42                 <refentrytitle>shutdown</refentrytitle>
43                 <manvolnum>8</manvolnum>
44         </refmeta>
45
46         <refnamediv>
47                 <refname>shutdown</refname>
48                 <refpurpose>Halt, power-off or reboot the machine</refpurpose>
49         </refnamediv>
50
51         <refsynopsisdiv>
52                 <cmdsynopsis>
53                         <command>shutdown <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt">TIME</arg> <arg choice="opt" rep="repeat">WALL</arg></command>
54                 </cmdsynopsis>
55         </refsynopsisdiv>
56
57         <refsect1>
58                 <title>Description</title>
59
60                 <para><command>shutdown</command> may be used to halt,
61                 power-off or reboot the machine.</para>
62
63                 <para>The first argument may be a time string (which
64                 is usually <literal>now</literal>). Optionally, this
65                 may be followed by a wall message to be sent to all
66                 logged-in users before going down.</para>
67
68                 <para>The time string may either be in the format
69                 <literal>hh:mm</literal> for hour/minutes specifying
70                 the time to execute the shutdown at, specified in 24h
71                 clock format. Alternatively it may be in the syntax
72                 <literal>+m</literal> referring to the specified
73                 number of minutes m from now. <literal>now</literal>
74                 is an alias for <literal>+0</literal>, i.e. for
75                 triggering an immediate shutdown. If no time argument
76                 is specified, <literal>+1</literal> is
77                 implied.</para>
78
79                 <para>Note that to specify a wall message you must
80                 specify a time argument, too.</para>
81
82                 <para>If the time argument is used, 5 minutes
83                 before the system goes down the
84                 <filename>/run/nologin</filename> file is created to
85                 ensure that further logins shall not be
86                 allowed.</para>
87         </refsect1>
88
89         <refsect1>
90                 <title>Options</title>
91
92                 <para>The following options are understood:</para>
93
94                 <variablelist>
95                         <varlistentry>
96                                 <term><option>--help</option></term>
97
98                                 <xi:include href="standard-options.xml" xpointer="help-text" />
99                         </varlistentry>
100
101                         <varlistentry>
102                                 <term><option>-H</option></term>
103                                 <term><option>--halt</option></term>
104
105                                 <listitem><para>Halt the machine.</para></listitem>
106                         </varlistentry>
107
108                         <varlistentry>
109                                 <term><option>-P</option></term>
110                                 <term><option>--poweroff</option></term>
111
112                                 <listitem><para>Power-off the
113                                 machine (the default).</para></listitem>
114                         </varlistentry>
115
116                         <varlistentry>
117                                 <term><option>-r</option></term>
118                                 <term><option>--reboot</option></term>
119
120                                 <listitem><para>Reboot the
121                                 machine.</para></listitem>
122                         </varlistentry>
123
124                         <varlistentry>
125                                 <term><option>-h</option></term>
126
127                                 <listitem><para>Equivalent to
128                                 <option>--poweroff</option>, unless
129                                 <option>--halt</option> is
130                                 specified.</para></listitem>
131                         </varlistentry>
132
133                         <varlistentry>
134                                 <term><option>-k</option></term>
135
136                                 <listitem><para>Do not halt, power-off,
137                                 reboot, just write wall
138                                 message.</para></listitem>
139                         </varlistentry>
140
141                         <varlistentry>
142                                 <term><option>--no-wall</option></term>
143
144                                 <listitem><para>Do not send wall
145                                 message before
146                                 halt, power-off, reboot.</para></listitem>
147                         </varlistentry>
148
149                         <varlistentry>
150                                 <term><option>-c</option></term>
151
152                                 <listitem><para>Cancel a pending
153                                 shutdown. This may be used cancel the
154                                 effect of an invocation of
155                                 <command>shutdown</command> with a
156                                 time argument that is not
157                                 <literal>+0</literal> or
158                                 <literal>now</literal>.</para></listitem>
159                         </varlistentry>
160
161                 </variablelist>
162         </refsect1>
163
164         <refsect1>
165                 <title>Exit status</title>
166
167                 <para>On success, 0 is returned, a non-zero failure
168                 code otherwise.</para>
169         </refsect1>
170
171         <refsect1>
172                 <title>See Also</title>
173                 <para>
174                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
175                         <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
176                         <citerefentry><refentrytitle>halt</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
177                         <citerefentry project='man-pages'><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry>
178                 </para>
179         </refsect1>
180
181 </refentry>