script for killing a process running on given port

killp.sh

# kill process running on given port
# argument: port number
# example usage:
# > killp 3000
function killp() {
    local tmp
    local exit_status

    echo "looking for process running on port: $1"
    tmp=$(lsof -i :"$1" | awk '{ print $2}' | grep "^[0-9][0-9]*$")
    exit_status=$?

    if [ $exit_status -ne 0 ]; then
        echo "\e[41munable to find the process!\e[0m"
    else
        echo "trying to kill process: $tmp"
        kill -9 "$tmp"
        exit_status=$?

        if [ $exit_status -ne 0 ]; then
            echo "\e[41munable to kill the process!\e[0m"
        else
            echo "\e[30;48;5;82msuccessfully killed the process!\e[0m"
        fi
    fi

    echo "exit status: $exit_status"
    return $exit_status
}

Example usage output: