System Grab Bag

View all man pages from Ubuntu (or from all projects)

Name

systemd-logind.service, systemd-logind - Login manager

Synopsis

systemd-logind.service

/lib/systemd/systemd-logind

Description

systemd-logind is a system service that manages user logins. It is responsible for: \h'-04'\(bu\h'+03'\c

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 [email protected] for each logged in user. \h'-04'\(bu\h'+03'\c

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. \h'-04'\(bu\h'+03'\c

Providing \m[blue]polkit\m[]\&\s-2\u[1]\d\s+2-based access for users for operations such as system shutdown or sleep \h'-04'\(bu\h'+03'\c

Implementing a shutdown/sleep inhibition logic for applications \h'-04'\(bu\h'+03'\c

Handling of power/sleep hardware keys \h'-04'\(bu\h'+03'\c

Multi-seat management \h'-04'\(bu\h'+03'\c

Session switch management \h'-04'\(bu\h'+03'\c

Device access management for users \h'-04'\(bu\h'+03'\c

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

User sessions are registered with logind via the pam_systemd(8) PAM module.

See logind.conf(5) for information about the configuration of this service.

See sd-login(3) for information about the basic concepts of logind such as users, sessions and seats.

See org.freedesktop.login1(5) and org.freedesktop.LogControl1(5) for information about the D-Bus APIs systemd-logind provides.

For more information on the inhibition logic see the \m[blue]Inhibitor Lock Developer Documentation\m[]\&\s-2\u[2]\d\s+2.

If you are interested in writing a display manager that makes use of logind, please have look at \m[blue]Writing Display Managers\m[]\&\s-2\u[3]\d\s+2. If you are interested in writing a desktop environment that makes use of logind, please have look at \m[blue]Writing Desktop Environments\m[]\&\s-2\u[4]\d\s+2.

See Also

systemd(1), systemd-user-sessions.service(8), loginctl(1), logind.conf(5), pam_systemd(8), sd-login(3)

Notes

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

Inhibitor Lock Developer Documentation \%https://www.freedesktop.org/wiki/Software/systemd/inhibit

Writing Display Managers \%https://www.freedesktop.org/wiki/Software/systemd/writing-display-managers

Writing Desktop Environments \%https://www.freedesktop.org/wiki/Software/systemd/writing-desktop-environments