linux - Trying to enable passwordless sudo

I want to enable passwordless sudo for user "bamboo" on my host, so I have added

bamboo ALL=NOPASSWD: ALL

and also

%admin ALL=(ALL) NOPASSWD: ALL

(user bamboo is in the admin group) to the /etc/sudoers, logged out, logged in, but the sudo still asks for a password. I am on "Ubuntu 12.10" ... Any idea what do I wrong?

Thanks, f.

Answer

You have different mistakes in each line:
On the user ilne, you have not specified the COMMANDS portion, should be:

bamboo ALL=(ALL) NOPASSWD:ALL

On the group line, you used admin instead of admins:

%admins ALL=(ALL) NOPASSWD:ALL