How to add users to /etc/sudoers

“If you’ve worked with a Linux long enough, you will have
come in contact with the sudo utility. What is sudo? Sudo has been
brilliantly described by the XKCD comic here. What sudo does is
allow a user to run commands and applications with the security
privileges of another user. Most often this is used in
distributions where the root user has been locked out and then
gives the standard user the privileges to do things like install
applications or run applications that would normally require
administrative rights. For example: When you want to restart
networking you would normally run the command
/etc/init.d/networking restart as the administrative user. But
without being able to log in as the administrative user, you would
instead issue that same command like: sudo /etc/initi.d/networking
restart. You would be asked for your users’ password and
networking would restart.

“But what if, as a system administrator, you add a new user and
want to give them similar sudo rights? How do you go about doing
this? Could you just open the /etc/sudoers file in your favorite
text editor and make some changes? No. There is another tool that
you must use called visudo. The reason for this is that the visudo
command ensures that only one person can edit the /etc/sudoers file
at a time…”

Complete
Story