Type (systems)

simple, exec, forking, oneshot, dbus, notify or idle

https://www.freedesktop.org/software/systemd/man/systemd.service.html

See also

• Systemd services: systemctl [status | is-active | start | daemon-reload | stop | mask | reload | restart | reboot | enable | disable | cat], systemctl list-units, systemctl list-timers, systemctl --failed, systemctl get-default, systemctl --help, .service, .timer, .socket, systemctl restart elasticsearch.service, systemctl status apt-daily, systemctl status oscapd