How to see which process open socket in Linux(Redhat)

Hi: I have an application which is written by Java and runs on a Linux machine. Redhat is OS. It seems that there is many socket open without being closed. How could I know from OS level which process has opened socket?

JianJunShenAsked:
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for_yanConnect With a Mentor Commented:

I guess if your java appliaction running in java  virtual machine keeps open sockets on the system level you'll see it
as belonging to your  java command  - corresponding to the start of the virtual machine

http://www.tech-recipes.com/rx/227/find-out-which-process-is-holding-which-socket-open/
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objectsConnect With a Mentor Commented:
you can use lsof or netstat for that
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