After updating sudoers user still does not have access to sudo

Question

I'm having problems adding a user to the sudoers list via the /etc/sudoers file.

$ whoami
iain

And they said I was crazy!

$ which visudo
/usr/sbin/visudo

$ ls -la /usr/sbin/visudo
---x--x--x  1 root  wheel  186768 23 Jun  2009 /usr/sbin/visudo


$ sudo su -
Password:
macbook:~ root# whoami
root
macbook:~ root# visudo

The file opens in vi:

# this line is the one I added to sudoers
# I gave ALL as access to try and get this to work
# it's the same setting as my account, which works.
%yvonne         ALL=(ALL) ALL

I save the file. It shows "unchanged" here because I'd already done it.

visudo: /etc/sudoers.tmp unchanged
macbook:~ root# logout

Log in as yvonne…

$ sudo su - yvonne

yvonne@87 02/08/2013 19:34 $ whoami
yvonne

Try to run anything via sudo:

yvonne@88 02/08/2013 19:34 $ sudo ls

WARNING: Improper use of the sudo command could lead to data loss
or the deletion of important system files. Please double-check your
typing when using sudo. Type "man sudo" for more information.

To proceed, enter your password, or type Ctrl-C to abort.

Password:
**yvonne is not in the sudoers file.  This incident will be reported.**

I'm perplexed, can anyone give me any help or insight so that I can give the yvonne account access to sudo? It would be much appreciated.

Answer 1

% is the group assignment operator in sudoers. I think you want the line to read:

yvonne         ALL=(ALL) ALL