How do you get lsof to produce numeric port information instead of attempting to resolve the port to service name?
For example, I want TCP *:http (LISTEN) to give me TCP *:80 (LISTEN) in-fact if at all possible I never want to see another service name in lsof print-out ever again. So if there is a way to make numeric ports the default I would like to understand how to do that as well.
Run lsof -P.
And make sure the P goes before the i, if you combine the option with -i:
lsof -Pi
According to man lsof, -P inhibits the conversion of port numbers to port names for network files. Inhibiting the conversion may make lsof run a little faster. It is also useful when port name lookup is not working properly."