How systemd determines when a service is considered “started” (i.e. when After= dependents can proceed).
Common values:
simple(default) — started as soon as the main process is forkedexec— started after the binary is exec’dforking— started after the parent process exits (traditional daemon behavior)notify— started after the process sendssd_notify(READY=1)oneshot— started after the process exits (for short-lived tasks)dbus— started after acquiring a D-Bus name