systemd-user-sessions (8) - Linux Manuals
systemd-user-sessions: Permit user logins after boot, prohibit user logins at shutdown
NAME
systemd-user-sessions.service, systemd-user-sessions - Permit user logins after boot, prohibit user logins at shutdown
SYNOPSIS
systemd-user-sessions.service
/lib/systemd/systemd-user-sessions
DESCRIPTION
systemd-user-sessions.service is a service that controls user logins through pam_nologin(8). After basic system initialization is complete, it removes /run/nologin, thus permitting logins. Before system shutdown, it creates /run/nologin, thus prohibiting further logins.