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 systemd.
8 Copyright 2010 Lennart Poettering
10 systemd 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 systemd 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 systemd; 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 elogind login manager</para>
67 <title>Options</title>
69 <para>The following options are understood:</para>
73 <term><option>--no-ask-password</option></term>
75 <listitem><para>Do not query the user for authentication for
76 privileged operations.</para></listitem>
80 <term><option>-p</option></term>
81 <term><option>--property=</option></term>
83 <listitem><para>When showing session/user/seat properties,
84 limit display to certain properties as specified as argument.
85 If not specified, all set properties are shown. The argument
86 should be a property name, such as
87 <literal>Sessions</literal>. If specified more than once, all
88 properties with the specified names are
89 shown.</para></listitem>
93 <term><option>-a</option></term>
94 <term><option>--all</option></term>
96 <listitem><para>When showing session/user/seat properties,
97 show all properties regardless of whether they are set or
98 not.</para></listitem>
102 <term><option>-l</option></term>
103 <term><option>--full</option></term>
105 <listitem><para>Do not ellipsize process tree entries.</para>
110 <term><option>--kill-who=</option></term>
112 <listitem><para>When used with
113 <command>kill-session</command>, choose which processes to
114 kill. Must be one of <option>leader</option>, or
115 <option>all</option> to select whether to kill only the leader
116 process of the session or all processes of the session. If
117 omitted, defaults to <option>all</option>.</para></listitem>
121 <term><option>-s</option></term>
122 <term><option>--signal=</option></term>
124 <listitem><para>When used with <command>kill-session</command>
125 or <command>kill-user</command>, choose which signal to send
126 to selected processes. Must be one of the well known signal
127 specifiers, such as <constant>SIGTERM</constant>,
128 <constant>SIGINT</constant> or <constant>SIGSTOP</constant>.
129 If omitted, defaults to
130 <constant>SIGTERM</constant>.</para></listitem>
134 <term><option>-n</option></term>
135 <term><option>--lines=</option></term>
137 <listitem><para>When used with <command>user-status</command>
138 and <command>session-status</command>, controls the number of
139 journal lines to show, counting from the most recent ones.
140 Takes a positive integer argument. Defaults to 10.</para>
145 <term><option>-o</option></term>
146 <term><option>--output=</option></term>
148 <listitem><para>When used with <command>user-status</command>
149 and <command>session-status</command>, controls the formatting
150 of the journal entries that are shown. For the available
152 <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
153 Defaults to <literal>short</literal>.</para></listitem>
156 <xi:include href="user-system-options.xml" xpointer="host" />
157 <xi:include href="user-system-options.xml" xpointer="machine" />
159 <xi:include href="standard-options.xml" xpointer="no-pager" />
160 <xi:include href="standard-options.xml" xpointer="no-legend" />
161 <xi:include href="standard-options.xml" xpointer="help" />
162 <xi:include href="standard-options.xml" xpointer="version" />
167 <title>Commands</title>
169 <para>The following commands are understood:</para>
171 <refsect2><title>Session Commands</title><variablelist>
174 <term><command>list-sessions</command></term>
176 <listitem><para>List current sessions.</para></listitem>
180 <term><command>session-status</command> <optional><replaceable>ID</replaceable>...</optional></term>
182 <listitem><para>Show terse runtime status information about
183 one or more sessions, followed by the most recent log data
184 from the journal. Takes one or more session identifiers as
185 parameters. If no session identifiers are passed the status of
186 the caller's session is shown. This function is intended to
187 generate human-readable output. If you are looking for
188 computer-parsable output, use <command>show-session</command>
189 instead.</para></listitem>
193 <term><command>show-session</command> <optional><replaceable>ID</replaceable>...</optional></term>
195 <listitem><para>Show properties of one or more sessions or the
196 manager itself. If no argument is specified, properties of the
197 manager will be shown. If a session ID is specified,
198 properties of the session are shown. By default, empty
199 properties are suppressed. Use <option>--all</option> to show
200 those too. To select specific properties to show, use
201 <option>--property=</option>. This command is intended to be
202 used whenever computer-parsable output is required. Use
203 <command>session-status</command> if you are looking for
204 formatted human-readable output.</para></listitem>
208 <term><command>activate</command> <optional><replaceable>ID</replaceable></optional></term>
210 <listitem><para>Activate a session. This brings a session into
211 the foreground, if another session is currently in the
212 foreground on the respective seat. Takes a session identifier
213 as argument. If no argument is specified the session of the
214 caller is put into foreground.</para></listitem>
218 <term><command>lock-session</command> <optional><replaceable>ID</replaceable>...</optional></term>
219 <term><command>unlock-session</command> <optional><replaceable>ID</replaceable>...</optional></term>
221 <listitem><para>Activates/deactivates the screen lock on one
222 or more sessions, if the session supports it. Takes one or
223 more session identifiers as arguments. If no argument is
224 specified the session of the caller is locked/unlocked.
229 <term><command>lock-sessions</command></term>
230 <term><command>unlock-sessions</command></term>
232 <listitem><para>Activates/deactivates the screen lock on all
233 current sessions supporting it. </para></listitem>
237 <term><command>terminate-session</command> <replaceable>ID</replaceable>...</term>
239 <listitem><para>Terminates a session. This kills all processes
240 of the session and deallocates all resources attached to the
241 session. </para></listitem>
245 <term><command>kill-session</command> <replaceable>ID</replaceable>...</term>
247 <listitem><para>Send a signal to one or more processes of the
248 session. Use <option>--kill-who=</option> to select which
249 process to kill. Use <option>--signal=</option> to select the
250 signal to send.</para></listitem>
252 </variablelist></refsect2>
254 <refsect2><title>User Commands</title><variablelist>
256 <term><command>list-users</command></term>
258 <listitem><para>List currently logged in users.
263 <term><command>user-status</command> <optional><replaceable>USER</replaceable>...</optional></term>
265 <listitem><para>Show terse runtime status information about
266 one or more logged in users, followed by the most recent log
267 data from the journal. Takes one or more user names or numeric
268 user IDs as parameters. If no parameters are passed the status
269 of the caller's user is shown. This function is intended to
270 generate human-readable output. If you are looking for
271 computer-parsable output, use <command>show-user</command>
272 instead. Users may be specified by their usernames or numeric
273 user IDs. </para></listitem>
277 <term><command>show-user</command> <optional><replaceable>USER</replaceable>...</optional></term>
279 <listitem><para>Show properties of one or more users or the
280 manager itself. If no argument is specified, properties of the
281 manager will be shown. If a user is specified, properties of
282 the user are shown. By default, empty properties are
283 suppressed. Use <option>--all</option> to show those too. To
284 select specific properties to show, use
285 <option>--property=</option>. This command is intended to be
286 used whenever computer-parsable output is required. Use
287 <command>user-status</command> if you are looking for
288 formatted human-readable output.</para></listitem>
292 <term><command>enable-linger</command> <optional><replaceable>USER</replaceable>...</optional></term>
293 <term><command>disable-linger</command> <optional><replaceable>USER</replaceable>...</optional></term>
295 <listitem><para>Enable/disable user lingering for one or more
296 users. If enabled for a specific user, a user manager is
297 spawned for the user at boot and kept around after logouts.
298 This allows users who are not logged in to run long-running
299 services. Takes one or more user names or numeric UIDs as
300 argument. If no argument is specified enables/disables
301 lingering for the user of the session of the caller.
306 <term><command>terminate-user</command> <replaceable>USER</replaceable>...</term>
308 <listitem><para>Terminates all sessions of a user. This kills
309 all processes of all sessions of the user and deallocates all
310 runtime resources attached to the user.</para></listitem>
314 <term><command>kill-user</command> <replaceable>USER</replaceable>...</term>
316 <listitem><para>Send a signal to all processes of a user. Use
317 <option>--signal=</option> to select the signal to send.
320 </variablelist></refsect2>
322 <refsect2><title>Seat Commands</title><variablelist>
324 <term><command>list-seats</command></term>
326 <listitem><para>List currently available seats on the local
327 system.</para></listitem>
331 <term><command>seat-status</command> <optional><replaceable>NAME</replaceable>...</optional></term>
333 <listitem><para>Show terse runtime status information about
334 one or more seats. Takes one or more seat names as parameters.
335 If no seat names are passed the status of the caller's
336 session's seat is shown. This function is intended to generate
337 human-readable output. If you are looking for
338 computer-parsable output, use <command>show-seat</command>
339 instead.</para></listitem>
343 <term><command>show-seat</command> <optional><replaceable>NAME</replaceable>...</optional></term>
345 <listitem><para>Show properties of one or more seats or the
346 manager itself. If no argument is specified, properties of the
347 manager will be shown. If a seat is specified, properties of
348 the seat are shown. By default, empty properties are
349 suppressed. Use <option>--all</option> to show those too. To
350 select specific properties to show, use
351 <option>--property=</option>. This command is intended to be
352 used whenever computer-parsable output is required. Use
353 <command>seat-status</command> if you are looking for
354 formatted human-readable output.</para></listitem>
358 <term><command>attach</command> <replaceable>NAME</replaceable> <replaceable>DEVICE</replaceable>...</term>
360 <listitem><para>Persistently attach one or more devices to a
361 seat. The devices should be specified via device paths in the
362 <filename>/sys</filename> file system. To create a new seat,
363 attach at least one graphics card to a previously unused seat
364 name. Seat names may consist only of a-z, A-Z, 0-9,
365 <literal>-</literal> and <literal>_</literal> and must be
366 prefixed with <literal>seat</literal>. To drop assignment of a
367 device to a specific seat, just reassign it to a different
368 seat, or use <command>flush-devices</command>.
373 <term><command>flush-devices</command></term>
375 <listitem><para>Removes all device assignments previously
376 created with <command>attach</command>. After this call, only
377 automatically generated seats will remain, and all seat
378 hardware is assigned to them.</para></listitem>
382 <term><command>terminate-seat</command> <replaceable>NAME</replaceable>...</term>
384 <listitem><para>Terminates all sessions on a seat. This kills
385 all processes of all sessions on the seat and deallocates all
386 runtime resources attached to them.</para></listitem>
388 </variablelist></refsect2>
393 <title>Exit status</title>
395 <para>On success, 0 is returned, a non-zero failure code
399 <xi:include href="less-variables.xml" />
402 <title>See Also</title>
404 <citerefentry><refentrytitle>elogind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>