If you will forget the password of root user in redhat linux installed with grub boot loader how one can recover it?
check open source section this has been explained in great detail.
its very easy do some google & u will get it! ..
it goes press 'e' at the beginning & then U have to change some statements shown at the screen .. for them do googling!
gud luck
Take a search mate. I have already posted this many times.
Cone on guys,
just check the search link just with ur profile link,
do use it then go for any question