check process from port

lsof -i:8080
nestat -tnlp

[출처] 

https://stackoverflow.com/questions/11583562/how-to-kill-a-process-running-on-particular-port-in-linux

https://zetawiki.com/wiki/%EB%A6%AC%EB%88%85%EC%8A%A4_%EB%A1%9C%EC%BB%AC%EC%84%9C%EB%B2%84_%EC%97%B4%EB%A6%B0_%ED%8F%AC%ED%8A%B8_%ED%99%95%EC%9D%B8