systemd-logind is a system service that manages user logins. It is
o Keeping track of users and sessions, their processes and their idle
o Creating control groups for user processes
o Providing PolicyKit-based access for users to operations such as
system shutdown or sleep
o Implementing a shutdown/sleep inhibition logic for applications
o Handling of power/sleep hardware keys
o Multi-seat management
o Session switch management
o Device access management for users
o Automatic spawning of text logins (gettys) on virtual console
activation and user runtime directory management
User sessions are registered in logind via the pam_systemd(8) PAM
See logind.conf(5) for information about the configuration of this
See Multi-Seat on Linux for an introduction into basic concepts of
logind such as users, sessions and seats.
See the logind D-Bus API Documentation for information about the
APIs systemd-logind provides.
For more information on the inhibition logic see the Inhibitor Lock
systemd(1), systemd-user-sessions.service(8), loginctl(1),
1. Multi-Seat on Linux
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