systemd-logind.service

systemd
systemd-logind.service 8
systemd-logind.service systemd-logind Login manager

`systemd-logind.service`

`/usr/lib/systemd/systemd-logind`

## Description

`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-based access for users for operations such as system shutdown or sleep

- 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

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 Inhibitor Lock Developer Documentation.

If you are interested in writing a display manager that makes use of logind, please have look at Writing Display Managers. If you are interested in writing a desktop environment that makes use of logind, please have look at Writing Desktop Environments.

## See Also

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