systemd Developer Lennart Poettering lennart@poettering.net systemd-user-sessions.service 8 systemd-user-sessions.service systemd-user-sessions Permit user logins after boot, prohibit user logins at shutdown systemd-user-sessions.service /usr/lib/systemd/systemd-user-sessions systemd-user-sessions.service is a service that controls user logins. After basic system initialization is complete it removes /run/nologin, thus permitting logins. Before system shutdown it creates /run/nologin, thus prohibiting further logins. At the same time it also kills all user processes, so that system shutdown may proceed without any remaining user processes around. systemd1, systemd-logind.service8, pam_nologin8