You need root access to add a user to the sudoers file. Enter as root user:
# su -
and put in the root password. Then use this command
to make changes on the /etc/sudoers file. It is not recommended to edit the file using text editor.
To add a user, enter the line in appropriate location.
username ALL=(ALL) ALL
%groupname ALL=(ALL) ALL
Privilege separation is one of the fundamental security paradigms implemented in Linux and Unix-like operating systems. Regular users operate with limited privileges in order to reduce the scope of their influence to their own environment, and not the wider operating system.
A special user, called
root, has “super-user” privileges. This is an administrative account without the restrictions that are present on normal users. Users can execute commands with “super-user” or “root” privileges in a number of different ways.
In this article, we will discuss how to correctly and securely obtain root privileges, with a special focus on editing the