Kill process on specific port

kill-process-by-port.sh

# sudo lsof -i :<PortNumber>
# kill -9 <PID>
# or
# kill -9 $(lsof -ti:<Port>, <Port>)
# The -t flag removes everything but the PID from the lsof output

# Error: listen EADDRINUSE: address already in use ::::3000

$ lsof -i tcp:3000
# COMMAND PID   USER  FD  TYPE DEVICE             SIZE/OFF NODE NAME 
# node    44475 chen5 31u IPv4 0x8b1721168764e4bf 0t0 TCP *:strexec-s (LISTEN)

$ kill -9 44475

# or
$ kill -9 $(lsof -ti:3000)

#or
npx kill-port 3000

# or
$ lsof -ti:3000 | xargs kill