I had a problem with tomcat, it says that port 8080 is already in use so I can not use it ...

What I did ?

1- Find what application/process is using the pro, type:

sudo netstat -lpn |grep :8080

and press Enter.

You will get an output similar to this one

tcp6 0 0 :::8080 :::* LISTEN 6782/java

2- I have got the process Id, which is 6782, now this is the process that is using port 8080.

3- Kill the process, type:kill 6782

kill 6782

and now port 8080 is free.

:)