Commands run by systemd when a service starts. These are written as ExecStart= entries in the unit file and apply only to .service units.

Enter one command per line. For ordinary long-running daemons this is usually a single absolute command, for example /usr/bin/node /home/app/server.js.

Multiple start commands are best used with Type=oneshot. For other service types, multiple commands are combined through a shell command so systemd still has one main process to track.