Here's how to recover from a forgotten GRUB bootloader password:
Edit /boot/grub/grub.conf and comment out (#) or delete the password entry. Then, GRUB will no longer require a password to edit the boot lines.
If you want to assign a new password perform these steps:
**enter `grub` as root.
**Enter a new password.
The password will then be output to the terminal in MD5 format.
Then you can cut and paste (or highlight and middle-click) this encrypted password into your password statement.