> > > $ sudo ss -l4pon | grep [port] > > That grep command is wrong in a couple ways. > > First, the unquoted [port] is a live glob pattern for the shell.
I meant port number here, i.e.: $ sudo ss -l4pon | grep 80 > Finally, you added the -n option to ss, which means it no longer prints > service names; it prints port numbers instead. Exactly, because I had a port number in my mind > (And now that I've written all of this, it occurs to me that maybe > you were using [port] as a syntactic symbol meaning "put the numeric > port number here". Normally we'd use <port> or _port_ for that. Yes, you are right. I should have written it as <port>, not [port]. Sorry for the misleading comment. I was trying to say that in modern Linux netstat is not installed by default and ``ss`` is a preferred way.
