How to find which porcess is 'listening' on certain port

[Amod Phadke]

Hi,

when I do 'netstat -a' I get the following output for a port (7500)

tcp4 0 0 *.7500 *.* LISTEN

I want to know which process is listening on this port. I don't get any conclusive report from 'ps -ef'.

[Patrick Chim · Accepted solution]

Hi,

You can use 'lsof' and can be downloaded in

http://hpux.cs.utah.edu/

e.g. lsof -i tcp:7500

and then it will give you the process id that listening on this port

Hope this help !

Regards,
Patrick

[V. V. Ravi Kumar_1]

hi,
lsof is useful in this case. search forums for lsof, u will find lot of answers.
#lsof -i:7500
will list all the processes which use this port.

regds

[Juan Manuel López]

Please, I try to use lsof on my hpux machine, so does not work because the runtime of my machine is 64 and lsof downloaded is 32...where can I find lsof 64 bits ?
Thanks. Juanma.

[V. V. Ravi Kumar_1]

hi,
iam attaching lsof binary. unshar it (sh lsof64.shar) and use it. it generates one execuatable and man page. hope it will be useful.

regds

[Amod Phadke]

Try ftp://ftp.cerias.purdue.edu/pub/tools/unix/sysutils/lsof

AMOD.

[Yogeeraj_1]

hi,

lsof should work!
E.g.
============================================================
$ /home/lsof -i:1521
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
oracle 19677 ias902 14u inet 0x4a997380 0t6924 TCP myserver.home.mu:49870->slx
2.cmt.mu:1521 (ESTABLISHED)
tnslsnr 19702 ias902 8u inet 0x4a427b40 0t0 TCP *:1521 (LISTEN)
tnslsnr 19702 ias902 9u inet 0x4abd8980 0t6924 TCP myserver.home.mu:1521->slx2
.cmt.mu:49870 (ESTABLISHED)
$ pwd
============================================================

I downloaded the source and compiled it on my HP-UX 11.11. It is working fine ;)

Hope this helps!
Best Regards
yogeeraj