sudoers

/etc/sudoers

• http://ubuntuforums.org/showthread.php?t=1132821
• http://askubuntu.com/questions/73864/how-to-modify-a-invalid-etc-sudoers-file-it-throws-out-an-error-and-not-allowi
• http://askubuntu.com/questions/504652/adding-nopasswd-in-etc-sudoers-doesnt-work