How to add a user to the sudoers list (Ubuntu Linux)

Adding a user to the sudoers list:

1. Open a Root Terminal. (Open a terminal then run ¨su¨ command.)
2. Run ¨visudo¨ command. (This is the only way to add a user to the sudoers list.)
3. Using the up/down arrows, go to the line that looks like the following:
root ALL=(ALL) ALL
4. Then, add the following line:
name_of_user ALL=(ALL) ALL
5. Press Ctrl+X and press Y when promted to save.