For ubuntu 16.04 add sudoer in current ssh login session

addLocalSudoer.sh

#!/bin/bash
## - Ref: https://www.digitalocean.com/community/tutorials/how-to-create-a-sudo-user-on-ubuntu-quickstart
echo "ONLY use this script on ubuntu 16.04 -- \"lay down butcher's knife, become a Buddha on the spot\""

# Adding ...
printf "Type to-be-created usr name: "
read username
echo ""

sudo adduser ${username}
sudo usermod -aG sudo ${username}

# TODO XXX
# validation