What is it?
Sudoers is a list of users which may execute root commands. A sudoers file is made up of two types of entries, aliases and user specifications
How to set it up?
Do a visudo on command line, then add the user to the list as below.
If you want to enter the user’s password before executing the command:
myuser ALL=(ALL) ALL
And without a password:
myuser ALL=(ALL) NOPASSWD: ALL