Kill a process by its (partial) name

pnkill.sh

#!/bin/bash
E_BADARGS=65
if [ $# -ne 2 -a $# -ne 1 ]
then
    echo "Usage: $0 {processNameWithoutSpaces} [{signal}]"
    exit $E_BADARGS
fi


process_name="$1"
signal="$2"

if [ "x$signal" = "x" ]; then
    signal="-9"
fi

sudo ps aux | grep "$process_name" | grep -v "grep $process_name" | awk '{print $2}' | xargs sudo kill "$signal"