This guide will take you through the process of adding a new user and granting them sudo permissions by adding them to the sudo group in Ubuntu. This should work on all Debian based Operating Systems.
In order to follow this tutorial, you will need the following
Adding a new user
If you are creating a new account then you can use the following command to create a new user.
sudo adduser username
Add user to Sudo Group
You can then use the following command to add that user (or any other) to the sudo group.
sudo adduser username sudo
You may need to logout/in for this to take effect.