Have you ever tried to start a server up and it can't grab the socket because "the port is in use"? this little command is the simplest way I know to quickly get the Process ID of the port hog
fuser -v 8080/tcp
How about lsof -i | grep 8080
lsof -i | grep 8080
@barnettjw Works too, I used to use lsof, but found fuser to be much faster.