Fedora: How can I add myself back to sudoers file?

33volx · 11-19-2014, 11:19 AM

I've accidentally removed myself from sudoers file by doing `usermod -G user group` without `-a`, and now I am not in the `sudoers` group. I've tried doing `su -` and entering root's password but it says `su: Authecation failure`. Is there a way to add myself back? Using Fedora 20.

linosaurusroot · 11-19-2014, 11:32 AM

If you are physically at the computer and willing to reboot it then using rescue media such as a bootable CD should help you.

To get root without rebooting would need more knowledge of your system than you have posted. Are other users in the sudoers group? Are remote commands allowed as root?

33volx · 11-19-2014, 11:38 AM

No, no other users are in sudoers group AFAIK (personal computer, I have just one main user).
I think I am going to use Live CD Ubuntu, and try to sudo there and edit /etc/shadow, as explained here: http://unix.stackexchange.com/questi.../168422#168422. Will that work?

33volx · 11-19-2014, 12:55 PM

Oke, I've managed to fix this. I had to reset my root password: http://fedoraproject.org/wiki/How_to..._root_password. And then I managed to get myself back into sudoers group