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+<?xml version='1.0'?> <!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
+
+<refentry id="systemd-logind.service" conditional='ENABLE_LOGIND'>
+
+ <refentryinfo>
+ <title>systemd-logind.service</title>
+ <productname>systemd</productname>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-logind.service</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-logind.service</refname>
+ <refname>systemd-logind</refname>
+ <refpurpose>Login manager</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-logind.service</filename></para>
+ <para><filename>/usr/lib/systemd/systemd-logind</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><command>systemd-logind</command> is a system service that
+ manages user logins. It is responsible for:</para>
+
+ <itemizedlist>
+ <listitem><para>Keeping track of users and sessions, their processes and their idle state. This is implemented by
+ allocating a systemd slice unit for each user below <filename>user.slice</filename>, and a scope unit below it
+ for each concurrent session of a user. Also, a per-user service manager is started as system service instance of
+ <filename>user@.service</filename> for each logged in user.</para></listitem>
+
+ <listitem><para>Generating and managing session IDs. If auditing is available and an audit session ID is already set for
+ a session, then this ID is reused as the session ID. Otherwise, an independent session counter is
+ used.</para></listitem>
+
+ <listitem><para>Providing <ulink
+ url="https://www.freedesktop.org/wiki/Software/polkit">polkit</ulink>-based access for users for
+ operations such as system shutdown or sleep</para>
+ </listitem>
+
+ <listitem><para>Implementing a shutdown/sleep inhibition logic for applications</para></listitem>
+
+ <listitem><para>Handling of power/sleep hardware keys</para></listitem>
+
+ <listitem><para>Multi-seat management</para></listitem>
+
+ <listitem><para>Session switch management</para></listitem>
+
+ <listitem><para>Device access management for users</para></listitem>
+
+ <listitem><para>Automatic spawning of text logins (gettys) on virtual console activation and user
+ runtime directory management</para></listitem>
+
+ <listitem><para>Scheduled shutdown</para></listitem>
+
+ <listitem><para>Sending "wall" messages</para></listitem>
+ </itemizedlist>
+
+ <para>User sessions are registered with logind via the
+ <citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ PAM module.</para>
+
+ <para>See
+ <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for information about the configuration of this service.</para>
+
+ <para>See
+ <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ for information about the basic concepts of logind
+ such as users, sessions and seats.</para>
+
+ <para>See
+ <citerefentry><refentrytitle>org.freedesktop.login1</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ and
+ <citerefentry><refentrytitle>org.freedesktop.LogControl1</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for information about the D-Bus APIs <filename>systemd-logind</filename> provides.</para>
+
+ <para>For more information on the inhibition logic see the <ulink
+ url="https://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor
+ Lock Developer Documentation</ulink>.</para>
+
+ <para>If you are interested in writing a display manager that makes use of logind, please have look at
+ <ulink url="https://www.freedesktop.org/wiki/Software/systemd/writing-display-managers">Writing Display
+ Managers</ulink>.
+ If you are interested in writing a desktop environment that makes use of logind, please have look at
+ <ulink url="https://www.freedesktop.org/wiki/Software/systemd/writing-desktop-environments">Writing
+ Desktop Environments</ulink>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-user-sessions.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>pam_systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>