1 <?xml version='
1.0'
?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC
"-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
4 <!-- SPDX-License-Identifier: LGPL-2.1+ -->
6 <refentry id=
"systemd-logind.service" conditional='ENABLE_LOGIND'
>
9 <title>systemd-logind.service
</title>
10 <productname>systemd
</productname>
14 <refentrytitle>systemd-logind.service
</refentrytitle>
15 <manvolnum>8</manvolnum>
19 <refname>systemd-logind.service
</refname>
20 <refname>systemd-logind
</refname>
21 <refpurpose>Login manager
</refpurpose>
25 <para><filename>systemd-logind.service
</filename></para>
26 <para><filename>/usr/lib/systemd/systemd-logind
</filename></para>
30 <title>Description
</title>
32 <para><command>systemd-logind
</command> is a system service that
33 manages user logins. It is responsible for:
</para>
36 <listitem><para>Keeping track of users and sessions, their processes and their idle state. This is implemented by
37 allocating a systemd slice unit for each user below
<filename>user.slice
</filename>, and a scope unit below it
38 for each concurrent session of a user. Also, a per-user service manager is started as system service instance of
39 <filename>user@.service
</filename> for each logged in user.
</para></listitem>
41 <listitem><para>Generating and managing session IDs. If auditing is available and an audit session ID is already set for
42 a session, then this ID is reused as the session ID. Otherwise, an independent session counter is
43 used.
</para></listitem>
45 <listitem><para>Providing
<ulink
46 url=
"http://www.freedesktop.org/wiki/Software/polkit">polkit
</ulink>-based
47 access for users for operations such as system shutdown or sleep
</para>
50 <listitem><para>Implementing a shutdown/sleep inhibition logic
51 for applications
</para></listitem>
53 <listitem><para>Handling of power/sleep hardware
54 keys
</para></listitem>
56 <listitem><para>Multi-seat management
</para></listitem>
58 <listitem><para>Session switch management
</para></listitem>
60 <listitem><para>Device access management for
61 users
</para></listitem>
63 <listitem><para>Automatic spawning of text logins (gettys) on
64 virtual console activation and user runtime directory
65 management
</para></listitem>
68 <para>User sessions are registered with logind via the
69 <citerefentry><refentrytitle>pam_systemd
</refentrytitle><manvolnum>8</manvolnum></citerefentry>
73 <citerefentry><refentrytitle>logind.conf
</refentrytitle><manvolnum>5</manvolnum></citerefentry>
74 for information about the configuration of this service.
</para>
77 <citerefentry><refentrytitle>sd-login
</refentrytitle><manvolnum>3</manvolnum></citerefentry>
78 for information about the basic concepts of logind
79 such as users, sessions and seats.
</para>
82 url=
"https://www.freedesktop.org/wiki/Software/systemd/logind">
83 logind D-Bus API Documentation
</ulink> for information about the
84 APIs
<filename>systemd-logind
</filename> provides.
</para>
86 <para>For more information on the inhibition logic see the
<ulink
87 url=
"https://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor
88 Lock Developer Documentation
</ulink>.
</para>
92 <title>See Also
</title>
94 <citerefentry><refentrytitle>systemd
</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
95 <citerefentry><refentrytitle>systemd-user-sessions.service
</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
96 <citerefentry><refentrytitle>loginctl
</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
97 <citerefentry><refentrytitle>logind.conf
</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
98 <citerefentry><refentrytitle>pam_systemd
</refentrytitle><manvolnum>8</manvolnum></citerefentry>
99 <citerefentry><refentrytitle>sd-login
</refentrytitle><manvolnum>3</manvolnum></citerefentry>