$ find /usr/lib/systemd/system/ -type f -executable | sort /usr/lib/systemd/system/argus.service /usr/lib/systemd/system/inadyn.service /usr/lib/systemd/system/ntop.service /usr/lib/systemd/system/partimaged.service /usr/lib/systemd/system/pppoe-server.service /usr/lib/systemd/system/vnstat.service /usr/lib/systemd/system/wpa_supplicant.service man 5 systemd.service SYSTEMD.SERVICE(5) systemd.service SYSTEMD.SERVICE(5) NAME systemd.service - Service unit configuration SYNOPSIS service.service DESCRIPTION A unit configuration file whose name ends in .service encodes information about a process controlled and supervised by systemd.