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.
8 Copyright 2010 Lennart Poettering
10 elogind 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.
15 elogind 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.
20 You should have received a copy of the GNU Lesser General Public License
21 along with elogind; If not, see <http://www.gnu.org/licenses/>.
24 <!-- 0 /// elogind does not need to activate loginctl in configure
25 <refentry id="loginctl" conditional='ENABLE_LOGIND'
26 xmlns:xi="http://www.w3.org/2001/XInclude">
28 <refentry id="loginctl" xmlns:xi="http://www.w3.org/2001/XInclude">
32 <title>loginctl</title>
33 <productname>elogind</productname>
37 <contrib>Developer</contrib>
38 <firstname>Lennart</firstname>
39 <surname>Poettering</surname>
40 <email>lennart@poettering.net</email>
46 <refentrytitle>loginctl</refentrytitle>
47 <manvolnum>1</manvolnum>
51 <refname>loginctl</refname>
52 <refpurpose>Control the elogind login manager</refpurpose>
57 <command>loginctl</command>
58 <arg choice="opt" rep="repeat">OPTIONS</arg>
59 <arg choice="req">COMMAND</arg>
60 <arg choice="opt" rep="repeat">NAME</arg>
65 <title>Description</title>
67 <para><command>loginctl</command> may be used to introspect and
68 control the state of the
69 <!-- 0 /// elogind has no services and is in section 8
70 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
72 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
74 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>
80 <title>Options</title>
82 <para>The following options are understood:</para>
86 <term><option>--no-ask-password</option></term>
88 <listitem><para>Do not query the user for authentication for
89 privileged operations.</para></listitem>
93 <term><option>-p</option></term>
94 <term><option>--property=</option></term>
96 <listitem><para>When showing session/user/seat properties,
97 limit display to certain properties as specified as argument.
98 If not specified, all set properties are shown. The argument
99 should be a property name, such as
100 <literal>Sessions</literal>. If specified more than once, all
101 properties with the specified names are
102 shown.</para></listitem>
106 <term><option>--value</option></term>
109 <para>When printing properties with <command>show</command>,
110 only print the value, and skip the property name and
111 <literal>=</literal>.</para>
116 <term><option>-a</option></term>
117 <term><option>--all</option></term>
119 <listitem><para>When showing session/user/seat properties,
120 show all properties regardless of whether they are set or
121 not.</para></listitem>
125 <term><option>-l</option></term>
126 <term><option>--full</option></term>
128 <listitem><para>Do not ellipsize process tree entries.</para>
133 <term><option>--kill-who=</option></term>
135 <listitem><para>When used with
136 <command>kill-session</command>, choose which processes to
137 kill. Must be one of <option>leader</option>, or
138 <option>all</option> to select whether to kill only the leader
139 process of the session or all processes of the session. If
140 omitted, defaults to <option>all</option>.</para></listitem>
144 <term><option>-s</option></term>
145 <term><option>--signal=</option></term>
147 <listitem><para>When used with <command>kill-session</command>
148 or <command>kill-user</command>, choose which signal to send
149 to selected processes. Must be one of the well known signal
150 specifiers, such as <constant>SIGTERM</constant>,
151 <constant>SIGINT</constant> or <constant>SIGSTOP</constant>.
152 If omitted, defaults to
153 <constant>SIGTERM</constant>.</para></listitem>
156 <!-- 0 /// elogind does not support systemd-journal
158 <term><option>-n</option></term>
159 <term><option>--lines=</option></term>
161 <listitem><para>When used with <command>user-status</command>
162 and <command>session-status</command>, controls the number of
163 journal lines to show, counting from the most recent ones.
164 Takes a positive integer argument. Defaults to 10.</para>
169 <term><option>-o</option></term>
170 <term><option>--output=</option></term>
172 <listitem><para>When used with <command>user-status</command>
173 and <command>session-status</command>, controls the formatting
174 of the journal entries that are shown. For the available
176 <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
177 Defaults to <literal>short</literal>.</para></listitem>
181 <xi:include href="user-system-options.xml" xpointer="host" />
182 <xi:include href="user-system-options.xml" xpointer="machine" />
184 <xi:include href="standard-options.xml" xpointer="no-pager" />
185 <xi:include href="standard-options.xml" xpointer="no-legend" />
186 <xi:include href="standard-options.xml" xpointer="help" />
187 <xi:include href="standard-options.xml" xpointer="version" />
192 <title>Commands</title>
194 <para>The following commands are understood:</para>
196 <refsect2><title>Session Commands</title><variablelist>
199 <term><command>list-sessions</command></term>
201 <listitem><para>List current sessions.</para></listitem>
205 <term><command>session-status</command> <optional><replaceable>ID</replaceable>…</optional></term>
207 <listitem><para>Show terse runtime status information about
208 one or more sessions, followed by the most recent log data
209 from the journal. Takes one or more session identifiers as
210 parameters. If no session identifiers are passed, the status of
211 the caller's session is shown. This function is intended to
212 generate human-readable output. If you are looking for
213 computer-parsable output, use <command>show-session</command>
214 instead.</para></listitem>
218 <term><command>show-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
220 <listitem><para>Show properties of one or more sessions or the
221 manager itself. If no argument is specified, properties of the
222 manager will be shown. If a session ID is specified,
223 properties of the session are shown. By default, empty
224 properties are suppressed. Use <option>--all</option> to show
225 those too. To select specific properties to show, use
226 <option>--property=</option>. This command is intended to be
227 used whenever computer-parsable output is required. Use
228 <command>session-status</command> if you are looking for
229 formatted human-readable output.</para></listitem>
233 <term><command>activate</command> <optional><replaceable>ID</replaceable></optional></term>
235 <listitem><para>Activate a session. This brings a session into
236 the foreground if another session is currently in the
237 foreground on the respective seat. Takes a session identifier
238 as argument. If no argument is specified, the session of the
239 caller is put into foreground.</para></listitem>
243 <term><command>lock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
244 <term><command>unlock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
246 <listitem><para>Activates/deactivates the screen lock on one
247 or more sessions, if the session supports it. Takes one or
248 more session identifiers as arguments. If no argument is
249 specified, the session of the caller is locked/unlocked.
254 <term><command>lock-sessions</command></term>
255 <term><command>unlock-sessions</command></term>
257 <listitem><para>Activates/deactivates the screen lock on all
258 current sessions supporting it. </para></listitem>
262 <term><command>terminate-session</command> <replaceable>ID</replaceable>…</term>
264 <listitem><para>Terminates a session. This kills all processes
265 of the session and deallocates all resources attached to the
266 session. </para></listitem>
270 <term><command>kill-session</command> <replaceable>ID</replaceable>…</term>
272 <listitem><para>Send a signal to one or more processes of the
273 session. Use <option>--kill-who=</option> to select which
274 process to kill. Use <option>--signal=</option> to select the
275 signal to send.</para></listitem>
277 </variablelist></refsect2>
279 <refsect2><title>User Commands</title><variablelist>
281 <term><command>list-users</command></term>
283 <listitem><para>List currently logged in users.
288 <term><command>user-status</command> <optional><replaceable>USER</replaceable>…</optional></term>
290 <listitem><para>Show terse runtime status information about
291 one or more logged in users, followed by the most recent log
292 data from the journal. Takes one or more user names or numeric
293 user IDs as parameters. If no parameters are passed, the status
294 is shown for the user of the session of the caller. This
295 function is intended to generate human-readable output. If you
296 are looking for computer-parsable output, use
297 <command>show-user</command> instead.</para></listitem>
301 <term><command>show-user</command> <optional><replaceable>USER</replaceable>…</optional></term>
303 <listitem><para>Show properties of one or more users or the
304 manager itself. If no argument is specified, properties of the
305 manager will be shown. If a user is specified, properties of
306 the user are shown. By default, empty properties are
307 suppressed. Use <option>--all</option> to show those too. To
308 select specific properties to show, use
309 <option>--property=</option>. This command is intended to be
310 used whenever computer-parsable output is required. Use
311 <command>user-status</command> if you are looking for
312 formatted human-readable output.</para></listitem>
316 <term><command>enable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
317 <term><command>disable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
319 <listitem><para>Enable/disable user lingering for one or more
320 users. If enabled for a specific user, a user manager is
321 spawned for the user at boot and kept around after logouts.
322 This allows users who are not logged in to run long-running
323 services. Takes one or more user names or numeric UIDs as
324 argument. If no argument is specified, enables/disables
325 lingering for the user of the session of the caller.</para>
327 <para>See also <varname>KillUserProcesses=</varname> setting in
328 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
333 <term><command>terminate-user</command> <replaceable>USER</replaceable>…</term>
335 <listitem><para>Terminates all sessions of a user. This kills
336 all processes of all sessions of the user and deallocates all
337 runtime resources attached to the user.</para></listitem>
341 <term><command>kill-user</command> <replaceable>USER</replaceable>…</term>
343 <listitem><para>Send a signal to all processes of a user. Use
344 <option>--signal=</option> to select the signal to send.
347 </variablelist></refsect2>
349 <refsect2><title>Seat Commands</title><variablelist>
351 <term><command>list-seats</command></term>
353 <listitem><para>List currently available seats on the local
354 system.</para></listitem>
358 <term><command>seat-status</command> <optional><replaceable>NAME</replaceable>…</optional></term>
360 <listitem><para>Show terse runtime status information about
361 one or more seats. Takes one or more seat names as parameters.
362 If no seat names are passed the status of the caller's
363 session's seat is shown. This function is intended to generate
364 human-readable output. If you are looking for
365 computer-parsable output, use <command>show-seat</command>
366 instead.</para></listitem>
370 <term><command>show-seat</command> <optional><replaceable>NAME</replaceable>…</optional></term>
372 <listitem><para>Show properties of one or more seats or the
373 manager itself. If no argument is specified, properties of the
374 manager will be shown. If a seat is specified, properties of
375 the seat are shown. By default, empty properties are
376 suppressed. Use <option>--all</option> to show those too. To
377 select specific properties to show, use
378 <option>--property=</option>. This command is intended to be
379 used whenever computer-parsable output is required. Use
380 <command>seat-status</command> if you are looking for
381 formatted human-readable output.</para></listitem>
385 <term><command>attach</command> <replaceable>NAME</replaceable> <replaceable>DEVICE</replaceable>…</term>
387 <listitem><para>Persistently attach one or more devices to a
388 seat. The devices should be specified via device paths in the
389 <filename>/sys</filename> file system. To create a new seat,
390 attach at least one graphics card to a previously unused seat
391 name. Seat names may consist only of a–z, A–Z, 0–9,
392 <literal>-</literal> and <literal>_</literal> and must be
393 prefixed with <literal>seat</literal>. To drop assignment of a
394 device to a specific seat, just reassign it to a different
395 seat, or use <command>flush-devices</command>.
400 <term><command>flush-devices</command></term>
402 <listitem><para>Removes all device assignments previously
403 created with <command>attach</command>. After this call, only
404 automatically generated seats will remain, and all seat
405 hardware is assigned to them.</para></listitem>
409 <term><command>terminate-seat</command> <replaceable>NAME</replaceable>…</term>
411 <listitem><para>Terminates all sessions on a seat. This kills
412 all processes of all sessions on the seat and deallocates all
413 runtime resources attached to them.</para></listitem>
415 </variablelist></refsect2>
417 <!-- 1 /// elogind additionally supports a few systemctl commands. -->
418 <refsect2><title>System Commands</title><variablelist>
420 <term><command>poweroff</command></term>
423 <para>Print a wall message to all users, shut down and
424 power-off the system.</para>
428 <term><command>reboot <optional><replaceable>arg</replaceable></optional></command></term>
431 <para>Print a wall message to all users, shut down and
432 reboot the system.</para>
434 <para>If the optional argument
435 <replaceable>arg</replaceable> is given, it will be passed
436 as the optional argument to the
437 <citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
438 system call. The value is architecture and firmware
439 specific. As an example, <literal>recovery</literal> might
440 be used to trigger system recovery, and
441 <literal>fota</literal> might be used to trigger a
442 <quote>firmware over the air</quote> update.</para>
447 <term><command>suspend</command></term>
450 <para>Suspend the system.
456 <term><command>hibernate</command></term>
459 <para>Hibernate the system.
465 <term><command>hybrid-sleep</command></term>
468 <para>Hibernate and suspend the system.</para>
471 </variablelist></refsect2>
476 <title>Exit status</title>
478 <para>On success, 0 is returned, a non-zero failure code
483 <title>Examples</title>
486 <title>Querying user status</title>
488 <programlisting>$ loginctl user-status
490 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
493 Unit: user-1005.slice
499 ├─3473 login -- fatima
502 Apr 09 14:40:30 laptop login[2325]: pam_unix(login:session):
503 session opened for user fatima by LOGIN(uid=0)
504 Apr 09 14:40:30 laptop login[2325]: LOGIN ON tty3 BY fatima
507 <para>There are two sessions, 3 and 5. Session 3 is a graphical session,
508 marked with a star. The tree of processing including the two corresponding
509 scope units and the user manager unit are shown.</para>
513 <xi:include href="less-variables.xml" />
516 <title>See Also</title>
518 <!-- 0 /// elogind is in section 8
519 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
520 <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
521 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
523 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
525 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>