I tried renaming my root user account and for a second after saving it looked like it had no name whatsoever. That was the last time I could use the "lock" icon under Users & Groups.
I followed some instructions by rebooting in CMD+S mode and basically using
passwd command to reset it which allowed me to log in but I'm still powerless to use anything that requires admin privileges.
For instance, the "put in your root password" dialogue box is no longer pre-filled with my account name and no variation of the name seems to work.
sudo in the terminal results in:
~/lab ~ sudo nano /etc/sudoers Password: johnnyuser is not in the sudoers file. This incident will be reported.
What do I do to restore things to the way they were before?