systemd-logind is a system service that manages user logins. It is
       responsible for:

       o   Keeping track of users and sessions, their processes and their idle

       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[1] for an introduction into basic concepts of
       logind such as users, sessions and seats.

       See the logind D-Bus API Documentation[2] for information about the
       APIs systemd-logind provides.

       For more information on the inhibition logic see the Inhibitor Lock
       Developer Documentation[3].

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

        1. Multi-Seat on Linux

        2. logind D-Bus API Documentation

        3. Inhibitor Lock Developer Documentation
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