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>
98 <para>When printing properties with <command>show</command>,
99 only print the value, and skip the property name and
100 <literal>=</literal>.</para>
105 <term><option>-a</option></term>
106 <term><option>--all</option></term>
108 <listitem><para>When showing session/user/seat properties,
109 show all properties regardless of whether they are set or
110 not.</para></listitem>
114 <term><option>-l</option></term>
115 <term><option>--full</option></term>
117 <listitem><para>Do not ellipsize process tree entries.</para>
122 <term><option>--kill-who=</option></term>
124 <listitem><para>When used with
125 <command>kill-session</command>, choose which processes to
126 kill. Must be one of <option>leader</option>, or
127 <option>all</option> to select whether to kill only the leader
128 process of the session or all processes of the session. If
129 omitted, defaults to <option>all</option>.</para></listitem>
133 <term><option>-s</option></term>
134 <term><option>--signal=</option></term>
136 <listitem><para>When used with <command>kill-session</command>
137 or <command>kill-user</command>, choose which signal to send
138 to selected processes. Must be one of the well known signal
139 specifiers, such as <constant>SIGTERM</constant>,
140 <constant>SIGINT</constant> or <constant>SIGSTOP</constant>.
141 If omitted, defaults to
142 <constant>SIGTERM</constant>.</para></listitem>
145 <!-- 0 /// elogind does not support systemd-journal
147 <term><option>-n</option></term>
148 <term><option>--lines=</option></term>
150 <listitem><para>When used with <command>user-status</command>
151 and <command>session-status</command>, controls the number of
152 journal lines to show, counting from the most recent ones.
153 Takes a positive integer argument. Defaults to 10.</para>
158 <term><option>-o</option></term>
159 <term><option>--output=</option></term>
161 <listitem><para>When used with <command>user-status</command>
162 and <command>session-status</command>, controls the formatting
163 of the journal entries that are shown. For the available
165 <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
166 Defaults to <literal>short</literal>.</para></listitem>
170 <xi:include href="user-system-options.xml" xpointer="host" />
171 <xi:include href="user-system-options.xml" xpointer="machine" />
173 <xi:include href="standard-options.xml" xpointer="no-pager" />
174 <xi:include href="standard-options.xml" xpointer="no-legend" />
175 <xi:include href="standard-options.xml" xpointer="help" />
176 <xi:include href="standard-options.xml" xpointer="version" />
181 <title>Commands</title>
183 <para>The following commands are understood:</para>
185 <refsect2><title>Session Commands</title><variablelist>
188 <term><command>list-sessions</command></term>
190 <listitem><para>List current sessions.</para></listitem>
194 <term><command>session-status</command> <optional><replaceable>ID</replaceable>…</optional></term>
196 <listitem><para>Show terse runtime status information about
197 one or more sessions, followed by the most recent log data
198 from the journal. Takes one or more session identifiers as
199 parameters. If no session identifiers are passed, the status of
200 the caller's session is shown. This function is intended to
201 generate human-readable output. If you are looking for
202 computer-parsable output, use <command>show-session</command>
203 instead.</para></listitem>
207 <term><command>show-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
209 <listitem><para>Show properties of one or more sessions or the
210 manager itself. If no argument is specified, properties of the
211 manager will be shown. If a session ID is specified,
212 properties of the session are shown. By default, empty
213 properties are suppressed. Use <option>--all</option> to show
214 those too. To select specific properties to show, use
215 <option>--property=</option>. This command is intended to be
216 used whenever computer-parsable output is required. Use
217 <command>session-status</command> if you are looking for
218 formatted human-readable output.</para></listitem>
222 <term><command>activate</command> <optional><replaceable>ID</replaceable></optional></term>
224 <listitem><para>Activate a session. This brings a session into
225 the foreground if another session is currently in the
226 foreground on the respective seat. Takes a session identifier
227 as argument. If no argument is specified, the session of the
228 caller is put into foreground.</para></listitem>
232 <term><command>lock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
233 <term><command>unlock-session</command> <optional><replaceable>ID</replaceable>…</optional></term>
235 <listitem><para>Activates/deactivates the screen lock on one
236 or more sessions, if the session supports it. Takes one or
237 more session identifiers as arguments. If no argument is
238 specified, the session of the caller is locked/unlocked.
243 <term><command>lock-sessions</command></term>
244 <term><command>unlock-sessions</command></term>
246 <listitem><para>Activates/deactivates the screen lock on all
247 current sessions supporting it. </para></listitem>
251 <term><command>terminate-session</command> <replaceable>ID</replaceable>…</term>
253 <listitem><para>Terminates a session. This kills all processes
254 of the session and deallocates all resources attached to the
255 session. </para></listitem>
259 <term><command>kill-session</command> <replaceable>ID</replaceable>…</term>
261 <listitem><para>Send a signal to one or more processes of the
262 session. Use <option>--kill-who=</option> to select which
263 process to kill. Use <option>--signal=</option> to select the
264 signal to send.</para></listitem>
266 </variablelist></refsect2>
268 <refsect2><title>User Commands</title><variablelist>
270 <term><command>list-users</command></term>
272 <listitem><para>List currently logged in users.
277 <term><command>user-status</command> <optional><replaceable>USER</replaceable>…</optional></term>
279 <listitem><para>Show terse runtime status information about
280 one or more logged in users, followed by the most recent log
281 data from the journal. Takes one or more user names or numeric
282 user IDs as parameters. If no parameters are passed, the status
283 is shown for the user of the session of the caller. This
284 function is intended to generate human-readable output. If you
285 are looking for computer-parsable output, use
286 <command>show-user</command> instead.</para></listitem>
290 <term><command>show-user</command> <optional><replaceable>USER</replaceable>…</optional></term>
292 <listitem><para>Show properties of one or more users or the
293 manager itself. If no argument is specified, properties of the
294 manager will be shown. If a user is specified, properties of
295 the user are shown. By default, empty properties are
296 suppressed. Use <option>--all</option> to show those too. To
297 select specific properties to show, use
298 <option>--property=</option>. This command is intended to be
299 used whenever computer-parsable output is required. Use
300 <command>user-status</command> if you are looking for
301 formatted human-readable output.</para></listitem>
304 <!-- 0 /// elogind does not spawn a user manager. Mask until lingeringin elogind is clarified.
306 <term><command>enable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
307 <term><command>disable-linger</command> <optional><replaceable>USER</replaceable>…</optional></term>
309 <listitem><para>Enable/disable user lingering for one or more
310 users. If enabled for a specific user, a user manager is
311 spawned for the user at boot and kept around after logouts.
312 This allows users who are not logged in to run long-running
313 services. Takes one or more user names or numeric UIDs as
314 argument. If no argument is specified, enables/disables
315 lingering for the user of the session of the caller.</para>
317 <para>See also <varname>KillUserProcesses=</varname> setting in
318 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
324 <term><command>terminate-user</command> <replaceable>USER</replaceable>…</term>
326 <listitem><para>Terminates all sessions of a user. This kills
327 all processes of all sessions of the user and deallocates all
328 runtime resources attached to the user.</para></listitem>
332 <term><command>kill-user</command> <replaceable>USER</replaceable>…</term>
334 <listitem><para>Send a signal to all processes of a user. Use
335 <option>--signal=</option> to select the signal to send.
338 </variablelist></refsect2>
340 <refsect2><title>Seat Commands</title><variablelist>
342 <term><command>list-seats</command></term>
344 <listitem><para>List currently available seats on the local
345 system.</para></listitem>
349 <term><command>seat-status</command> <optional><replaceable>NAME</replaceable>…</optional></term>
351 <listitem><para>Show terse runtime status information about
352 one or more seats. Takes one or more seat names as parameters.
353 If no seat names are passed the status of the caller's
354 session's seat is shown. This function is intended to generate
355 human-readable output. If you are looking for
356 computer-parsable output, use <command>show-seat</command>
357 instead.</para></listitem>
361 <term><command>show-seat</command> <optional><replaceable>NAME</replaceable>…</optional></term>
363 <listitem><para>Show properties of one or more seats or the
364 manager itself. If no argument is specified, properties of the
365 manager will be shown. If a seat is specified, properties of
366 the seat are shown. By default, empty properties are
367 suppressed. Use <option>--all</option> to show those too. To
368 select specific properties to show, use
369 <option>--property=</option>. This command is intended to be
370 used whenever computer-parsable output is required. Use
371 <command>seat-status</command> if you are looking for
372 formatted human-readable output.</para></listitem>
376 <term><command>attach</command> <replaceable>NAME</replaceable> <replaceable>DEVICE</replaceable>…</term>
378 <listitem><para>Persistently attach one or more devices to a
379 seat. The devices should be specified via device paths in the
380 <filename>/sys</filename> file system. To create a new seat,
381 attach at least one graphics card to a previously unused seat
382 name. Seat names may consist only of a–z, A–Z, 0–9,
383 <literal>-</literal> and <literal>_</literal> and must be
384 prefixed with <literal>seat</literal>. To drop assignment of a
385 device to a specific seat, just reassign it to a different
386 seat, or use <command>flush-devices</command>.
391 <term><command>flush-devices</command></term>
393 <listitem><para>Removes all device assignments previously
394 created with <command>attach</command>. After this call, only
395 automatically generated seats will remain, and all seat
396 hardware is assigned to them.</para></listitem>
400 <term><command>terminate-seat</command> <replaceable>NAME</replaceable>…</term>
402 <listitem><para>Terminates all sessions on a seat. This kills
403 all processes of all sessions on the seat and deallocates all
404 runtime resources attached to them.</para></listitem>
406 </variablelist></refsect2>
408 <!-- 1 /// elogind additionally supports a few systemctl commands. -->
409 <refsect2><title>System Commands</title><variablelist>
411 <term><command>poweroff</command></term>
414 <para>Print a wall message to all users, shut down and
415 power-off the system.</para>
419 <term><command>reboot <optional><replaceable>arg</replaceable></optional></command></term>
422 <para>Print a wall message to all users, shut down and
423 reboot the system.</para>
425 <para>If the optional argument
426 <replaceable>arg</replaceable> is given, it will be passed
427 as the optional argument to the
428 <citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
429 system call. The value is architecture and firmware
430 specific. As an example, <literal>recovery</literal> might
431 be used to trigger system recovery, and
432 <literal>fota</literal> might be used to trigger a
433 <quote>firmware over the air</quote> update.</para>
438 <term><command>suspend</command></term>
441 <para>Suspend the system.
447 <term><command>hibernate</command></term>
450 <para>Hibernate the system.
456 <term><command>hybrid-sleep</command></term>
459 <para>Hibernate and suspend the system.</para>
462 </variablelist></refsect2>
467 <title>Exit status</title>
469 <para>On success, 0 is returned, a non-zero failure code
474 <title>Examples</title>
477 <title>Querying user status</title>
479 <!-- 0 /// With elogind no Unit and jurnald output is generated
480 <programlisting>$ loginctl user-status
482 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
485 Unit: user-1005.slice
491 ├─3473 login -- fatima
494 Apr 09 14:40:30 laptop login[2325]: pam_unix(login:session):
495 session opened for user fatima by LOGIN(uid=0)
496 Apr 09 14:40:30 laptop login[2325]: LOGIN ON tty3 BY fatima
499 <programlisting>$ loginctl user-status
501 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
504 Unit: user-1005.slice
508 <para>There are two sessions, 3 and 5. Session 3 is a graphical session,
509 marked with a star. The tree of processing including the two corresponding
510 scope units and the user manager unit are shown.</para>
514 <xi:include href="less-variables.xml" />
517 <title>See Also</title>
519 <!-- 0 /// elogind is in section 8
520 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
521 <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
522 <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
524 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
526 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>