I can't use sudo, how can I fix it?

Question

ubuntu

missing from the sudoers file. This action will be logged.

I turned the spit with these users, as a result, now I can’t use sudo, what should I do?

Answer 1

what exactly were they spinning?
drop root, then add your user to sudoers

Answer 2

Log in as root and add yourself to this group

Answer 3

pkexec adduser donwolfani sudo - add a user with sudo rights