systemd-logind.service, systemd-logind — systemd Login Manager
sysytemd-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; creating control
groups for user processes; provide PolicyKit-based
access for users to 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) and user
runtime directory management.
User sessions are registered in logind via the pam_systemd(8) PAM module.
See logind.conf(5) for information about the configuration of this service.
See Multi-Seat on Linux for an introduction into basic concepts of logind such as users, sessions and seats.