Home/ Questions/Q 6130703
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-23T16:53:22+00:00

When I do lsof -nl | egrep TCP|UDP in order to see socket states,

  • 0

When I do “lsof -nl | egrep “TCP|UDP” ” in order to see socket states, I notice that the sockets that I expected to be listed are not at all, but when I do a “netstat –tcp”, they are listed, but are in a CLOSE_WAIT state.

What I know so far is that the CLOSE_WAIT state signifies that my application has a responsibility now to explicitly close this socket (but there is a bug that I’m trying to track down, which keeps this socket in a CLOSE_WAIT state). I thought that if a socket exists, then it must have an open file descriptor associated with it, so I expected to see it on the output of lsof. Why is it that I couldn’t see it there?

Thanks,
Sandra

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Do you have enough permissions? (And I think this belongs to superuser)

    • 0