> > 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 > The command lsof run as root will tell you a lot of things including who is bound to a port. For example: lsof | grep 2345 Note that on various flavors unix, I have seen the "already in use" message for a short time after a program exits. That is, start a program which listens on a certain port, exit the program, immediately restart the program. A quick test says FC4 does not seem to do this. -- Bob Styma
