shell script to kill the process listening on port 3000? [duplicate]

Question

I want to define a bash alias named kill3000 to automate the following task:

$ lsof -i:3000  COMMAND   PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME ruby    13402 zero    4u  IPv4 2847851      0t0  TCP *:3000 (LISTEN)  $ kill -9 13402 

Answer 1

alias kill3000="fuser -k -n tcp 3000"