I lost administrative password.
I have tried - I know the regular method by which I go to GRUB menu and go to root (drop to root shell prompt) and set password there. It is well described - here. To be more specific I am aware about this method and have set the password many times when I have lost it before.
My problem - now my problem is that this method is not working. When I drop down to root shell it asks for root password again without which it does not progress. I do not have this password! What is the alternative then??