1. Creating a group
2. Create a user under the group
useradd -mg testers tester -s/bin/bash
3. Set password for the user
4. Add the user to sudoers list
visudo (command to open sudoers file. Dont open /etc/sudoers file in VI edior)
add this line to give the above group with full sudo access.
%testers ALL=(ALL) ALL