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">
6 This file is part of elogind.
7 SPDX-License-Identifier: LGPL-2.1+
10 Copyright 2010 Lennart Poettering
13 <!-- 0 /// elogind does not need to activate loginctl in configure
14 <refentry id="loginctl" conditional='ENABLE_LOGIND'
15 xmlns:xi="http://www.w3.org/2001/XInclude">
17 <refentry id="loginctl" xmlns:xi="http://www.w3.org/2001/XInclude">
21 <title>loginctl</title>
22 <productname>elogind</productname>
26 <contrib>Developer</contrib>
27 <firstname>Lennart</firstname>
28 <surname>Poettering</surname>
29 <email>lennart@poettering.net</email>
35 <refentrytitle>loginctl</refentrytitle>
36 <manvolnum>1</manvolnum>
40 <refname>loginctl</refname>
41 <refpurpose>Control the elogind login manager</refpurpose>
46 <command>loginctl</command>
47 <arg choice="opt" rep="repeat">OPTIONS</arg>
48 <arg choice="req">COMMAND</arg>
49 <arg choice="opt" rep="repeat">NAME</arg>
54 <title>Description</title>
56 <para><command>loginctl</command> may be used to introspect and
57 control the state of the
58 <!-- 0 /// elogind has no services and is in section 8
59 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
61 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
63 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>
69 <title>Options</title>
71 <para>The following options are understood:</para>
75 <term><option>--no-ask-password</option></term>
77 <listitem><para>Do not query the user for authentication for
78 privileged operations.</para></listitem>
82 <term><option>-p</option></term>
83 <term><option>--property=</option></term>
85 <listitem><para>When showing session/user/seat properties,
86 limit display to certain properties as specified as argument.
87 If not specified, all set properties are shown. The argument
88 should be a property name, such as
89 <literal>Sessions</literal>. If specified more than once, all
90 properties with the specified names are
91 shown.</para></listitem>
95 <term><option>--value</option></term>
97 <listitem><para>When showing session/user/seat properties,
98 only print the value, and skip the property name and
99 <literal>=</literal>.</para></listitem>
103 <term><option>-a</option></term>
104 <term><option>--all</option></term>
106 <listitem><para>When showing session/user/seat properties,
107 show all properties regardless of whether they are set or
108 not.</para></listitem>
112 <term><option>-l</option></term>
113 <term><option>--full</option></term>
115 <listitem><para>Do not ellipsize process tree entries.</para>
120 <term><option>--kill-who=</option></term>
122 <listitem><para>When used with
123 <command>kill-session</command>, choose which processes to
124 kill. Must be one of <option>leader</option>, or
125 <option>all</option> to select whether to kill only the leader
126 process of the session or all processes of the session. If
127 omitted, defaults to <option>all</option>.</para></listitem>
131 <term><option>-s</option></term>
132 <term><option>--signal=</option></term>
134 <listitem><para>When used with <command>kill-session</command>
135 or <command>kill-user</command>, choose which signal to send
136 to selected processes. Must be one of the well known signal
137 specifiers, such as <constant>SIGTERM</constant>,
138 <constant>SIGINT</constant> or <constant>SIGSTOP</constant>.
139 If omitted, defaults to
140 <constant>SIGTERM</constant>.</para></listitem>
143 <!-- 0 /// elogind does not support systemd-journal
145 <term><option>-n</option></term>
146 <term><option>--lines=</option></term>
148 <listitem><para>When used with <command>user-status</command>
149 and <command>session-status</command>, controls the number of
150 journal lines to show, counting from the most recent ones.
151 Takes a positive integer argument. Defaults to 10.</para>
156 <term><option>-o</option></term>
157 <term><option>--output=</option></term>
159 <listitem><para>When used with <command>user-status</command>
160 and <command>session-status</command>, controls the formatting
161 of the journal entries that are shown. For the available
163 <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
164 Defaults to <literal>short</literal>.</para></listitem>
168 <xi:include href="user-system-options.xml" xpointer="host" />
169 <xi:include href="user-system-options.xml" xpointer="machine" />
171 <xi:include href="standard-options.xml" xpointer="no-pager" />
172 <xi:include href="standard-options.xml" xpointer="no-legend" />
173 <xi:include href="standard-options.xml" xpointer="help" />
174 <xi:include href="standard-options.xml" xpointer="version" />
179 <title>Commands</title>
181 <para>The following commands are understood:</para>
183 <refsect2><title>Session Commands</title><variablelist>
186 <term><command>list-sessions</command></term>
188 <listitem><para>List current sessions.</para></listitem>
192 <term><command>session-status</command> <optional><replaceable>ID</replaceable>…</optional></term>
194 <listitem><para>Show terse runtime status information about
195 one or more sessions, followed by the most recent log data
196 from the journal. Takes one or more session identifiers as
197 parameters. If no session identifiers are passed, the status of
198 the caller's session is shown. This function is intended to
199 generate human-readable output. If you are looking for
200 computer-parsable output, use <command>show-session</command>
201 instead.</para></listitem>
205 <term><command>show-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
207 <listitem><para>Show properties of one or more sessions or the
208 manager itself. If no argument is specified, properties of the
209 manager will be shown. If a session ID is specified,
210 properties of the session are shown. By default, empty
211 properties are suppressed. Use <option>--all</option> to show
212 those too. To select specific properties to show, use
213 <option>--property=</option>. This command is intended to be
214 used whenever computer-parsable output is required. Use
215 <command>session-status</command> if you are looking for
216 formatted human-readable output.</para></listitem>
220 <term><command>activate</command> <optional><replaceable>ID</replaceable></optional></term>
222 <listitem><para>Activate a session. This brings a session into
223 the foreground if another session is currently in the
224 foreground on the respective seat. Takes a session identifier
225 as argument. If no argument is specified, the session of the
226 caller is put into foreground.</para></listitem>
230 <term><command>lock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
231 <term><command>unlock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
233 <listitem><para>Activates/deactivates the screen lock on one
234 or more sessions, if the session supports it. Takes one or
235 more session identifiers as arguments. If no argument is
236 specified, the session of the caller is locked/unlocked.
241 <term><command>lock-sessions</command></term>
242 <term><command>unlock-sessions</command></term>
244 <listitem><para>Activates/deactivates the screen lock on all
245 current sessions supporting it. </para></listitem>
249 <term><command>terminate-session</command> <replaceable>ID</replaceable>…</term>
251 <listitem><para>Terminates a session. This kills all processes
252 of the session and deallocates all resources attached to the
253 session. </para></listitem>
257 <term><command>kill-session</command> <replaceable>ID</replaceable>…</term>
259 <listitem><para>Send a signal to one or more processes of the
260 session. Use <option>--kill-who=</option> to select which
261 process to kill. Use <option>--signal=</option> to select the
262 signal to send.</para></listitem>
264 </variablelist></refsect2>
266 <refsect2><title>User Commands</title><variablelist>
268 <term><command>list-users</command></term>
270 <listitem><para>List currently logged in users.
275 <term><command>user-status</command> <optional><replaceable>USER</replaceable>…</optional></term>
277 <listitem><para>Show terse runtime status information about
278 one or more logged in users, followed by the most recent log
279 data from the journal. Takes one or more user names or numeric
280 user IDs as parameters. If no parameters are passed, the status
281 is shown for the user of the session of the caller. This
282 function is intended to generate human-readable output. If you
283 are looking for computer-parsable output, use
284 <command>show-user</command> instead.</para></listitem>
288 <term><command>show-user</command> <optional><replaceable>USER</replaceable>…</optional></term>
290 <listitem><para>Show properties of one or more users or the
291 manager itself. If no argument is specified, properties of the
292 manager will be shown. If a user is specified, properties of
293 the user are shown. By default, empty properties are
294 suppressed. Use <option>--all</option> to show those too. To
295 select specific properties to show, use
296 <option>--property=</option>. This command is intended to be
297 used whenever computer-parsable output is required. Use
298 <command>user-status</command> if you are looking for
299 formatted human-readable output.</para></listitem>
302 <!-- 0 /// elogind does not spawn a user manager. Mask until lingeringin elogind is clarified.
304 <term><command>enable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
305 <term><command>disable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
307 <listitem><para>Enable/disable user lingering for one or more
308 users. If enabled for a specific user, a user manager is
309 spawned for the user at boot and kept around after logouts.
310 This allows users who are not logged in to run long-running
311 services. Takes one or more user names or numeric UIDs as
312 argument. If no argument is specified, enables/disables
313 lingering for the user of the session of the caller.</para>
315 <para>See also <varname>KillUserProcesses=</varname> setting in
316 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
322 <term><command>terminate-user</command> <replaceable>USER</replaceable>…</term>
324 <listitem><para>Terminates all sessions of a user. This kills
325 all processes of all sessions of the user and deallocates all
326 runtime resources attached to the user.</para></listitem>
330 <term><command>kill-user</command> <replaceable>USER</replaceable>…</term>
332 <listitem><para>Send a signal to all processes of a user. Use
333 <option>--signal=</option> to select the signal to send.
336 </variablelist></refsect2>
338 <refsect2><title>Seat Commands</title><variablelist>
340 <term><command>list-seats</command></term>
342 <listitem><para>List currently available seats on the local
343 system.</para></listitem>
347 <term><command>seat-status</command> <optional><replaceable>NAME</replaceable>…</optional></term>
349 <listitem><para>Show terse runtime status information about
350 one or more seats. Takes one or more seat names as parameters.
351 If no seat names are passed the status of the caller's
352 session's seat is shown. This function is intended to generate
353 human-readable output. If you are looking for
354 computer-parsable output, use <command>show-seat</command>
355 instead.</para></listitem>
359 <term><command>show-seat</command> <optional><replaceable>NAME</replaceable>…</optional></term>
361 <listitem><para>Show properties of one or more seats or the
362 manager itself. If no argument is specified, properties of the
363 manager will be shown. If a seat is specified, properties of
364 the seat are shown. By default, empty properties are
365 suppressed. Use <option>--all</option> to show those too. To
366 select specific properties to show, use
367 <option>--property=</option>. This command is intended to be
368 used whenever computer-parsable output is required. Use
369 <command>seat-status</command> if you are looking for
370 formatted human-readable output.</para></listitem>
374 <term><command>attach</command> <replaceable>NAME</replaceable> <replaceable>DEVICE</replaceable>…</term>
376 <listitem><para>Persistently attach one or more devices to a
377 seat. The devices should be specified via device paths in the
378 <filename>/sys</filename> file system. To create a new seat,
379 attach at least one graphics card to a previously unused seat
380 name. Seat names may consist only of a–z, A–Z, 0–9,
381 <literal>-</literal> and <literal>_</literal> and must be
382 prefixed with <literal>seat</literal>. To drop assignment of a
383 device to a specific seat, just reassign it to a different
384 seat, or use <command>flush-devices</command>.
389 <term><command>flush-devices</command></term>
391 <listitem><para>Removes all device assignments previously
392 created with <command>attach</command>. After this call, only
393 automatically generated seats will remain, and all seat
394 hardware is assigned to them.</para></listitem>
398 <term><command>terminate-seat</command> <replaceable>NAME</replaceable>…</term>
400 <listitem><para>Terminates all sessions on a seat. This kills
401 all processes of all sessions on the seat and deallocates all
402 runtime resources attached to them.</para></listitem>
404 </variablelist></refsect2>
406 <!-- 1 /// elogind additionally supports a few systemctl commands. -->
407 <refsect2><title>System Commands</title><variablelist>
409 <term><command>poweroff</command></term>
412 <para>Print a wall message to all users, shut down and
413 power-off the system.</para>
417 <term><command>reboot <optional><replaceable>arg</replaceable></optional></command></term>
420 <para>Print a wall message to all users, shut down and
421 reboot the system.</para>
423 <para>If the optional argument
424 <replaceable>arg</replaceable> is given, it will be passed
425 as the optional argument to the
426 <citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
427 system call. The value is architecture and firmware
428 specific. As an example, <literal>recovery</literal> might
429 be used to trigger system recovery, and
430 <literal>fota</literal> might be used to trigger a
431 <quote>firmware over the air</quote> update.</para>
436 <term><command>suspend</command></term>
439 <para>Suspend the system.
445 <term><command>hibernate</command></term>
448 <para>Hibernate the system.
454 <term><command>hybrid-sleep</command></term>
457 <para>Hibernate and suspend the system.</para>
460 </variablelist></refsect2>
465 <title>Exit status</title>
467 <para>On success, 0 is returned, a non-zero failure code
472 <title>Examples</title>
475 <title>Querying user status</title>
477 <!-- 0 /// With elogind no Unit and jurnald output is generated
478 <programlisting>$ loginctl user-status
480 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
483 Unit: user-1005.slice
489 ├─3473 login -- fatima
492 Apr 09 14:40:30 laptop login[2325]: pam_unix(login:session):
493 session opened for user fatima by LOGIN(uid=0)
494 Apr 09 14:40:30 laptop login[2325]: LOGIN ON tty3 BY fatima
497 <programlisting>$ loginctl user-status
499 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
502 Unit: user-1005.slice
506 <para>There are two sessions, 3 and 5. Session 3 is a graphical session,
507 marked with a star. The tree of processing including the two corresponding
508 scope units and the user manager unit are shown.</para>
512 <xi:include href="less-variables.xml" />
515 <title>See Also</title>
517 <!-- 0 /// elogind is in section 8
518 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
519 <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
520 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
522 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
524 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>