Find Process by Listening Port

netstat -tulnp | grep 8080

Swtich
 -t : lists TCP connections
 -u : lists UDP connections
 -l : lists Listening ports.
 -n : lists connections that don't resolve names
 -p : displays program name that listens to the port

It will display process ID / Program name. for example

10135/java

Now display the program path.

ls -l /proc/10135/exe

Reference