result of ps -ef | grep?

Question

I'm new to Ubuntu and I've problem with port 6703

i executed this command

ps -ef | grep 6703

and got this result

user 4378 4308 0 09:40 pts/2 00:00:00 grep --color=auto 6703

but can't understand what does that mean ?

Answer 1

ps doesn't show network ports, at least not to my knowledge. The more appropriate command to use is netstat or lsof.

For instance, if I want to see whether or not my ssh server is listening on port 22, I can do this:

xieerqi@eagle:~$ sudo netstat -tulpan | grep ":22"
[sudo] password for xieerqi: 
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1012/sshd       
tcp6       0      0 :::22                   :::*                    LISTEN      1012/sshd

Same for lsof, if I want to check a specific port, like 58732

xieerqi@eagle:~$ sudo lsof | grep ":58732"
[sudo] password for xieerqi: 
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
      Output information may be incomplete.
firefox    2491          xieerqi   65u     IPv4            1948841         0t0        TCP eagle:58732->104.16.113.188:http (ESTABLISHED)

As to why your command returned

user 4378 4308 0 09:40 pts/2 00:00:00 grep --color=auto 6703

That is the only string that was matched in the output of ps, in other words, grep command itself is the only one on that list. And again, there wouldn't be anything else, because you're looking for ports, and ps doesnt show ports