systemd-logind8
Login manager
Part of systemd-logind.service(8).
Usage
systemd-logind.service
Overview
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 [email protected] 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
• 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
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 see Inhibitor Locks[2].
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].
Notes
- 1.
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polkit
https://www.freedesktop.org/wiki/Software/polkit
- 2.
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Inhibitor Locks
https://systemd.io/INHIBITOR_LOCKS
- 3.
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Writing Display Managers
https://systemd.io/WRITING_DISPLAY_MANAGERS
- 4.
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Writing Desktop Environments
https://systemd.io/WRITING_DESKTOP_ENVIRONMENTS
Releases
6 releases since Debian 8 (Jessie); the text changed 5 times.