lsof print numeric ports

Question

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.

Answer 1

Run lsof -P. 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."

Answer 2

Sometimes handy is:

lsof -Pi

When I tried losf -iP it gave me some trash, so make sure P goes first.

---

As a side note: lsof -3.14 will provide the same trash, don't try this.