Kill the process by process id script

kill_process_pid.sh

#!/bin/bash
 
if [[ $# -eq 0 ]] ; then
    echo 'Usage: ./$0 <port> <port> <port> ...'
    exit 0
fi
 
cnt=0
for port in $@; do
    while :; do
        processid=$(sudo lsof -i :$port | tail -1 | awk '{print $2}')
        if [[ ! -z "$processid" ]]; then
            echo "Killing process $processid"
            sudo kill -9 $processid
            cnt=$((cnt+1))
        else
            break
        fi
    done
done
 
exit $cnt