I broke sudo when I wrongly edited a file in /etc/sudoers.d in vi(did not use visudo :-().
I read that I could fix the same by rebooting into the 'Recovery Mode' by selecting the same from the grub menu.
However I'd earlier disabled the showing of the grub menu by editing /etc/default/grub. As a result I can't seem to go into recovery mode to fix my broken sudo.
How can I fix sudo now??