SYSTEMD-LOGIND.SERVICE(8) systemd-logind.service SYSTEMD-LOGIND.SERVICE(8)

.SH "NAME" systemd-logind.service, systemd-logind - Login manager

.SH "SYNOPSIS"

.PP systemd-logind.service

.PP /usr/lib/systemd/systemd-logind

.SH "DESCRIPTION"

.PP **systemd-logind** is a system service that manages user logins. It is responsible for:

•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 user.slice, 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 user@.service for each logged in user.

•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.

•Providing **polkit**\[1]-based access for users for operations such as system shutdown or sleep

.RE

•Implementing a shutdown/sleep inhibition logic for applications

•Handling of power/sleep hardware keys

•Multi-seat management

•Session switch management

•Device access management for users

•Automatic spawning of text logins (gettys) on virtual console activation and user runtime directory management

•Scheduled shutdown

•Sending "wall" messages

.PP User sessions are registered with logind via the [**pam\_systemd**(8)](/man/os/systemd/pam_systemd.8) PAM module.

.PP See [**logind.conf**(5)](/man/os/systemd/logind.conf.5) for information about the configuration of this service.

.PP See [**sd-login**(3)](/man/os/systemd/sd-login.3) for information about the basic concepts of logind such as users, sessions and seats.

.PP See [**org.freedesktop.login1**(5)](/man/os/systemd/org.freedesktop.login1.5) and [**org.freedesktop.LogControl1**(5)](/man/os/systemd/org.freedesktop.LogControl1.5) for information about the D-Bus APIs systemd-logind provides.

.PP In addition to the D-Bus interface, systemd-logind also provides a Varlink interface **io.systemd.Shutdown** for shutting down or rebooting the system. It supports **PowerOff**, **Reboot**, **Halt**, **KExec**, and **SoftReboot** methods. Each method accepts an optional *skipInhibitors* boolean parameter to bypass active block inhibitors (matching the **SD\_LOGIND\_SKIP\_INHIBITORS** flag of the D-Bus interface). The interface can be queried with **varlinkctl introspect /run/systemd/io.systemd.Login io.systemd.Shutdown**.

.PP For more information see **Inhibitor Locks**\[2].

.PP If you are interested in writing a display manager that makes use of logind, please have look at **Writing Display Managers**\[3]. If you are interested in writing a desktop environment that makes use of logind, please have look at **Writing Desktop Environments**\[4].

.SH "SIGNAL"

.PP **SIGHUP**

Reloads the service configuration file.

.RE

.SH "SEE ALSO"

.PP [**systemd**(1)](/man/os/systemd/systemd.1), [**systemd-user-sessions.service**(8)](/man/os/systemd/systemd-user-sessions.service.8), [**loginctl**(1)](/man/os/systemd/loginctl.1), [**logind.conf**(5)](/man/os/systemd/logind.conf.5), [**pam\_systemd**(8)](/man/os/systemd/pam_systemd.8), [**sd-login**(3)](/man/os/systemd/sd-login.3), [**org.freedesktop.login1**(5)](/man/os/systemd/org.freedesktop.login1.5)

# [NOTES](#NOTES)

1\.

polkit

https://www.freedesktop.org/wiki/Software/polkit

2\.

Inhibitor Locks

https://systemd.io/INHIBITOR\_LOCKS

3\.

Writing Display Managers

https://systemd.io/WRITING\_DISPLAY\_MANAGERS

4\.

Writing Desktop Environments

https://systemd.io/WRITING\_DESKTOP\_ENVIRONMENTS

systemd 262.2

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Document: systemd-logind.service(8) from systemd 262.2-r1 (Chainguard OS)
Source: https://github.com/systemd/systemd