systemd-shutdownd.service, systemd-shutdownd.socket, systemd-shutdownd − Scheduled shutdown service
systemd−shutdownd.service
systemd−shutdownd.socket
/usr/lib/systemd/systemd−shutdownd
systemd−shutdownd.service is a system service that implements scheduled shutdowns, as exposed by shutdown(8). systemd−shutdownd.service is automatically activated on request and terminates itself when it is unused.
systemd(1), shutdown(8)