Finding the process and its port number

[panks]

Hi,

I have restarted my production box having main application as oracle RAC. After reboot DBA reported that they couldn't start EM (Enterprise manager) to manage oracle service. Now they are suspecting that the port which EM use might be used by some other service in the system and thats the reason they couldn't start the EM. How can I find which process is using what port number. Also any additional suggestion for this scenario will be appreciated.
Thanks

[Torsten.]

Use lsof:

http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.81/

[panks]

It is giving page can't found for the lsof link provided by you.

[James R. Ferguson · Accepted solution]

Hi:

Use 'lsof'. Every server should have this installed:

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.81/

Regards!

...JRF...

[Torsten.]

another server

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.81/

[Dennis Handly]

>It is giving page can't found for the lsof link provided by you.

I've also had problems with hpux.cs.utah.edu. Not sure if it is a time of day or not?
The upper levels are there:
http://hpux.cs.utah.edu/hppd/hpux

And you can use that to find the main site.