Is there any way to recover my sudo power?

Question

I created a new user and changed the ssh config. I forgot to add root permission to the newly created user.

Now I need to undo my changes in ssh config. Is that possible without any sudo command?

Answer 1

If you have acess to the 'su' command, you can change to the root user without sudo permissions if you know the password of the root user. Use it like su root.