Answers for "kill port with cmdd"

kill app at port

#To list any process listening to the port 8080:
lsof -i:8080

#To kill any process listening to the port 8080:
kill $(lsof -t -i:8080)

#or more violently:
kill -9 $(lsof -t -i:8080)

kill process on port windows

netstat -ano | findstr "PORT_NUMBER"

taskkill /PID PORT_NUMBER /f