Title says it all; OS is standard Ubuntu 12.04LTS. I had a close call today where I removed all groups from my administrative user account while using usermod; I managed to revert the changes back but it was close to a disaster. Reason for using usermod was that could not find a way add a user to a group while using system settings -> user accounts.
So where is the hidden option in system settings -> user accounts that I'm looking for? Or is there a decent GUI utility for user management?
I'm convinced that older versions (10.04, 8.04 and 6.06) had the option easily accessible in the 'user accounts' utility.
After posting this, I saw http://ubuntuforums.org/showthread.php?t=2074218 which is basically the same question.