named.restart - stop and restart the name server
This command sends a SIGKILL to the running name serverand then starts a new one.
Does not check to see if the name server is actually running,and could use a stale PID cache file which mayresult in the death of an unrelated process.
Does not wait after killing the old server before startinga new one; since the server could take some time to dieand the new one will experience a fatal error if the oldone isn't gone by the time it starts, you can be left in asituation where you have no name server at all.