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 <refentry id="loginctl" xmlns:xi="http://www.w3.org/2001/XInclude">
27 <title>loginctl</title>
28 <productname>elogind</productname>
32 <contrib>Developer</contrib>
33 <firstname>Lennart</firstname>
34 <surname>Poettering</surname>
35 <email>lennart@poettering.net</email>
41 <refentrytitle>loginctl</refentrytitle>
42 <manvolnum>1</manvolnum>
46 <refname>loginctl</refname>
47 <refpurpose>Control the elogind login manager</refpurpose>
52 <command>loginctl</command>
53 <arg choice="opt" rep="repeat">OPTIONS</arg>
54 <arg choice="req">COMMAND</arg>
55 <arg choice="opt" rep="repeat">NAME</arg>
60 <title>Description</title>
62 <para><command>loginctl</command> may be used to introspect and
63 control the state of the
64 <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 <xi:include href="user-system-options.xml" xpointer="host" />
146 <xi:include href="user-system-options.xml" xpointer="machine" />
148 <xi:include href="standard-options.xml" xpointer="no-pager" />
149 <xi:include href="standard-options.xml" xpointer="no-legend" />
150 <xi:include href="standard-options.xml" xpointer="help" />
151 <xi:include href="standard-options.xml" xpointer="version" />
156 <title>Commands</title>
158 <para>The following commands are understood:</para>
160 <refsect2><title>Session Commands</title><variablelist>
163 <term><command>list-sessions</command></term>
165 <listitem><para>List current sessions.</para></listitem>
169 <term><command>session-status</command> <optional><replaceable>ID</replaceable>...</optional></term>
171 <listitem><para>Show terse runtime status information about
172 one or more sessions. Takes one or more session identifiers as
173 parameters. If no session identifiers are passed the status of
174 the caller's session is shown. This function is intended to
175 generate human-readable output. If you are looking for
176 computer-parsable output, use <command>show-session</command>
177 instead.</para></listitem>
181 <term><command>show-session</command> <optional><replaceable>ID</replaceable>...</optional></term>
183 <listitem><para>Show properties of one or more sessions or the
184 manager itself. If no argument is specified, properties of the
185 manager will be shown. If a session ID is specified,
186 properties of the session are shown. By default, empty
187 properties are suppressed. Use <option>--all</option> to show
188 those too. To select specific properties to show, use
189 <option>--property=</option>. This command is intended to be
190 used whenever computer-parsable output is required. Use
191 <command>session-status</command> if you are looking for
192 formatted human-readable output.</para></listitem>
196 <term><command>activate</command> <optional><replaceable>ID</replaceable></optional></term>
198 <listitem><para>Activate a session. This brings a session into
199 the foreground if another session is currently in the
200 foreground on the respective seat. Takes a session identifier
201 as argument. If no argument is specified, the session of the
202 caller is put into foreground.</para></listitem>
206 <term><command>lock-session</command> <optional><replaceable>ID</replaceable>...</optional></term>
207 <term><command>unlock-session</command> <optional><replaceable>ID</replaceable>...</optional></term>
209 <listitem><para>Activates/deactivates the screen lock on one
210 or more sessions, if the session supports it. Takes one or
211 more session identifiers as arguments. If no argument is
212 specified, the session of the caller is locked/unlocked.
217 <term><command>lock-sessions</command></term>
218 <term><command>unlock-sessions</command></term>
220 <listitem><para>Activates/deactivates the screen lock on all
221 current sessions supporting it. </para></listitem>
225 <term><command>terminate-session</command> <replaceable>ID</replaceable>...</term>
227 <listitem><para>Terminates a session. This kills all processes
228 of the session and deallocates all resources attached to the
229 session. </para></listitem>
233 <term><command>kill-session</command> <replaceable>ID</replaceable>...</term>
235 <listitem><para>Send a signal to one or more processes of the
236 session. Use <option>--kill-who=</option> to select which
237 process to kill. Use <option>--signal=</option> to select the
238 signal to send.</para></listitem>
240 </variablelist></refsect2>
242 <refsect2><title>User Commands</title><variablelist>
244 <term><command>list-users</command></term>
246 <listitem><para>List currently logged in users.
251 <term><command>user-status</command> <optional><replaceable>USER</replaceable>...</optional></term>
253 <listitem><para>Show terse runtime status information about
254 one or more logged in users. Takes one or more user names or numeric
255 user IDs as parameters. If no parameters are passed the status
256 of the caller's user is shown. This function is intended to
257 generate human-readable output. If you are looking for
258 computer-parsable output, use <command>show-user</command>
259 instead. Users may be specified by their usernames or numeric
260 user IDs. </para></listitem>
264 <term><command>show-user</command> <optional><replaceable>USER</replaceable>...</optional></term>
266 <listitem><para>Show properties of one or more users or the
267 manager itself. If no argument is specified, properties of the
268 manager will be shown. If a user is specified, properties of
269 the user are shown. By default, empty properties are
270 suppressed. Use <option>--all</option> to show those too. To
271 select specific properties to show, use
272 <option>--property=</option>. This command is intended to be
273 used whenever computer-parsable output is required. Use
274 <command>user-status</command> if you are looking for
275 formatted human-readable output.</para></listitem>
279 <term><command>enable-linger</command> <optional><replaceable>USER</replaceable>...</optional></term>
280 <term><command>disable-linger</command> <optional><replaceable>USER</replaceable>...</optional></term>
282 <listitem><para>Enable/disable user lingering for one or more
283 users. If enabled for a specific user, a user manager is
284 spawned for the user at boot and kept around after logouts.
285 This allows users who are not logged in to run long-running
286 services. Takes one or more user names or numeric UIDs as
287 argument. If no argument is specified, enables/disables
288 lingering for the user of the session of the caller.</para>
290 <para>See also <varname>KillUserProcesses=</varname> setting in
291 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
296 <term><command>terminate-user</command> <replaceable>USER</replaceable>...</term>
298 <listitem><para>Terminates all sessions of a user. This kills
299 all processes of all sessions of the user and deallocates all
300 runtime resources attached to the user.</para></listitem>
304 <term><command>kill-user</command> <replaceable>USER</replaceable>...</term>
306 <listitem><para>Send a signal to all processes of a user. Use
307 <option>--signal=</option> to select the signal to send.
310 </variablelist></refsect2>
312 <refsect2><title>Seat Commands</title><variablelist>
314 <term><command>list-seats</command></term>
316 <listitem><para>List currently available seats on the local
317 system.</para></listitem>
321 <term><command>seat-status</command> <optional><replaceable>NAME</replaceable>...</optional></term>
323 <listitem><para>Show terse runtime status information about
324 one or more seats. Takes one or more seat names as parameters.
325 If no seat names are passed the status of the caller's
326 session's seat is shown. This function is intended to generate
327 human-readable output. If you are looking for
328 computer-parsable output, use <command>show-seat</command>
329 instead.</para></listitem>
333 <term><command>show-seat</command> <optional><replaceable>NAME</replaceable>...</optional></term>
335 <listitem><para>Show properties of one or more seats or the
336 manager itself. If no argument is specified, properties of the
337 manager will be shown. If a seat is specified, properties of
338 the seat are shown. By default, empty properties are
339 suppressed. Use <option>--all</option> to show those too. To
340 select specific properties to show, use
341 <option>--property=</option>. This command is intended to be
342 used whenever computer-parsable output is required. Use
343 <command>seat-status</command> if you are looking for
344 formatted human-readable output.</para></listitem>
348 <term><command>attach</command> <replaceable>NAME</replaceable> <replaceable>DEVICE</replaceable>...</term>
350 <listitem><para>Persistently attach one or more devices to a
351 seat. The devices should be specified via device paths in the
352 <filename>/sys</filename> file system. To create a new seat,
353 attach at least one graphics card to a previously unused seat
354 name. Seat names may consist only of a–z, A–Z, 0–9,
355 <literal>-</literal> and <literal>_</literal> and must be
356 prefixed with <literal>seat</literal>. To drop assignment of a
357 device to a specific seat, just reassign it to a different
358 seat, or use <command>flush-devices</command>.
363 <term><command>flush-devices</command></term>
365 <listitem><para>Removes all device assignments previously
366 created with <command>attach</command>. After this call, only
367 automatically generated seats will remain, and all seat
368 hardware is assigned to them.</para></listitem>
372 <term><command>terminate-seat</command> <replaceable>NAME</replaceable>...</term>
374 <listitem><para>Terminates all sessions on a seat. This kills
375 all processes of all sessions on the seat and deallocates all
376 runtime resources attached to them.</para></listitem>
378 </variablelist></refsect2>
380 <refsect2><title>System Commands</title><variablelist>
381 </variablelist></refsect2>
383 <term><command>poweroff</command></term>
386 <para>Print a wall message to all users, shut down and
387 power-off the system.</para>
391 <term><command>reboot <optional><replaceable>arg</replaceable></optional></command></term>
394 <para>Print a wall message to all users, shut down and
395 reboot the system.</para>
397 <para>If the optional argument
398 <replaceable>arg</replaceable> is given, it will be passed
399 as the optional argument to the
400 <citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
401 system call. The value is architecture and firmware
402 specific. As an example, <literal>recovery</literal> might
403 be used to trigger system recovery, and
404 <literal>fota</literal> might be used to trigger a
405 <quote>firmware over the air</quote> update.</para>
410 <term><command>suspend</command></term>
413 <para>Suspend the system.
419 <term><command>hibernate</command></term>
422 <para>Hibernate the system.
428 <term><command>hybrid-sleep</command></term>
431 <para>Hibernate and suspend the system.</para>
436 <title>Exit status</title>
438 <para>On success, 0 is returned, a non-zero failure code
443 <title>Examples</title>
446 <title>Querying user status</title>
448 <programlisting>$ loginctl user-status
450 Since: Sat 2016-04-09 14:23:31 EDT; 54min ago
453 Unit: user-1005.slice
459 ├─3473 login -- fatima
462 Apr 09 14:40:30 laptop login[2325]: pam_unix(login:session):
463 session opened for user fatima by LOGIN(uid=0)
464 Apr 09 14:40:30 laptop login[2325]: LOGIN ON tty3 BY fatima
467 <para>There are two sessions, 3 and 5. Session 3 is a graphical session,
468 marked with a star. The tree of processing including the two corresponding
469 scope units and the user manager unit are shown.</para>
473 <xi:include href="less-variables.xml" />
476 <title>See Also</title>
478 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
479 <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
480 <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>