What is the purpose of the systemd-logind daemon?

  • Also see: systemd-logind.service(8), systemd-logind(8) - Login manager

    From the man page:

    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 PolicyKit-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

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