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I have a process which I need to run on a specific port. I have started some other process on that port and I need to kill it.

Unfortunately, I don't remember the name/pid of the other process so I need a quick way to find which PID are associated with it.

I tried lsof -i :7080 but that returned nothing. I can telnet localhost 7080 so I know its running.

For reference I'm running RHEL5

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3 Answers 3

Try:

netstat -nap | grep 7080
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It might be better to use netstat -nap | grep :7080. Especially for lower ports it reduces the output a lot. –  Gert Sep 23 '10 at 11:13
    
why does this produce an answer when lsof -i:7080 doesn't? OR does it? –  jmtd Sep 24 '10 at 22:21

In FreeBSD:

sockstat -4 

for IPV6

sockstat -6
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As root, with ss installed:

ss -p -l '( sport = :7080 )'

You should also check the files in /etc/xinetd.d and the output of rpcinfo -p

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