What process bound to what port?

[Charles Wurts]

Hey folks,

How can you tell what process is listening on what tcp/ip port. For example when you look at a netstat -an as below, how can you tell what process is doing the listening.

netstat -an | grep -i listen
tcp 0 0 *.49619 *.* LISTEN
tcp 0 0 *.10864 *.* LISTEN

Is this easy to figure out?

Thanks
-Chuck

[Torsten. · Accepted solution]

Best tool for questions like this is "lsof":

http://hpux.asknet.de/hppd/hpux/Sysadmin/lsof-4.78/

[Tim Nelson]

lsof is the way..

/usr/local/bin/lsof -i :23
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
inetd 1039 root 6u IPv6 0xe00000013c0e6580 0t0 TCP *:telnet (LISTEN)

[Charles Wurts]

Yep - downloaded lsof and it works like a champ.

Thanks for help!

-Chuck

[Charles Wurts]

Worked