Hello, I am playing around with writing a program to bind to socket / port in my machine. Often time, I got the message: bind(): Address already in use So my question is, how do I find out which process bind to a certain port number ? For example, how do I find out what process use port 2345? Sometimes 'ps ax' does not really show the process that I though bind that port number, although bind() gave the error message. Plus 'ps ax' does not really help unless you know the process name anyway. Thanks for any help. RDB