[리눅스] 특정 사용중인 포트 찾기

netstat -tulpn | grep 포트번호

(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp6 0 0 :::8080 :::* LISTEN 22352/java

요롷게 나오면

sudo kill -9 22352

잡았다 요놈