Originally Posted by Corona688

This is why you use visudo, not sudo vi to edit /etc/sudoers.

There was probably a warning in the file telling you such, like there is in mine:

Code:

## sudoers file.
##
## This file MUST be edited with the 'visudo' command as root.
## Failure to use 'visudo' may result in syntax or file permission errors
## that prevent sudo from running.
##
## See the sudoers man page for the details on how to write a sudoers file.
##

Now you will need real root access to fix it.

sudo may have had security features preventing you from raw editing it anyway - it might not work again, even fixed, until you run visudo and re-save from root.