# svc -d /service/whatever- Bring the server down
# svc -u /service/whatever- Start the server up and leave it in keepalive mode.
# svc -o /service/whatever- Start the server up once. Do not restart it if it stops.
# svc -t /service/whatever- Stop and immediately restart the server.
# svc -k /service/whatever- Sends the server a KILL signal. This is like KILL -9. If svc -t fails to fully kill the process, use this option.
(Thanks to the OpenACS documentation)