summaryrefslogtreecommitdiff
path: root/man/poweroff.xml
blob: 2841dc77690d7dd105e63ea1b7e1644bd2d7fcdb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
<?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="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>

        <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, when either <command>halt</command>
        or <command>poweroff</command> is invoked. This option is ignored when
        <command>reboot</command> 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 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>
        </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></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 power-off, reboot, or halt.
        </para></listitem>
      </varlistentry>

      <varlistentry>
        <term><option>--no-wall</option></term>

        <listitem><para>Do not send wall message before power-off, reboot, or halt.</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>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>
      <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>