Kill a process by port

kill_by_port.sh

#This will print you PID of process bound on that port.
fuser 8080/tcp

#And this will kill that process.
fuser -k 8080/tcp

#Works on Linux only. More universal is use of lsof -i4 (or 6 for IPv6).

#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)