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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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SYSTEMD-LOGIND.SERVICE(8) systemd-logind.serviceSYSTEMD-LOGIND.SERVICE(8)
systemd-logind.service, systemd-logind - Login manager
systemd-logind.service
/usr/lib/systemd/systemd-logind
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
• 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].
systemd(1), systemd-user-sessions.service(8), loginctl(1),
logind.conf(5), pam_systemd(8), sd-login(3),
org.freedesktop.login1(5)
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
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a
bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-08-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
systemd 258~rc2 SYSTEMD-LOGIND.SERVICE(8)
Pages that refer to this page: loginctl(1), systemctl(1), sd_bus_creds_get_pid(3), sd-login(3), logind.conf(5), org.freedesktop.login1(5), systemd.slice(5), user@.service(5), systemd.directives(7), systemd.index(7), systemd.special(7), pam_systemd(8), systemd-machined.service(8), systemd-user-sessions.service(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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