[SOLVED] no users have administrator priveleges

[johnr9]

I am sorry if this is the wrong place to post, but I had administrator rights for my machine running ubuntu 7.10, I am the only user with administrator rights and i clicked on users and groups and my user name and properties etc. and unclicked the checkbox administer the system; there was no error message and now no users have administrator rights, and apparently I cannot undo the action.
What do I do?

[Dr Small]

Reboot, and at the GRUB menu, boot into Recovery Mode.
From there, you will be taken to the root prompt. If I am not mistaken, I believe you need to run:
adduser username wheel

To add the user back to the wheel group.

[Oldsoldier2003]

Ubuntu doesn't use the wheel group subsitute admin for wheel in the above command. adduser username admin

[Dr Small]

Ah, ok. I couldn't remember if it was wheel or admin. It's been awhile since I've been on Ubuntu.

[johnr9]

thanks alot - it worked

[trksh22]

Thanks so much! This happened to me and your instructions worked perfectly! :)