Remove grub password

Remove grub password allowing you to edit grub lines.

1. Boot vm from Red Hat or Centos cd

2. Select "Troubleshooting" from the menu File:Troubleshooting.jpg

3. Select the "Rescue" option from the menu

4. Select "Continue" from the menu, this will mount the os to /mnt/sysimage

5. Depending on what distro you are running you need to edit one of these files:

/grub/menu.lst
/boot/grub/menu.lst
/etc/grub.conf
/boot/grub/grub.conf

6. type:

vi menu.lst

7. Completely remove the line that starts with "Password", you can do this by moving to the line and pressing "dd"

8. Save and exit using:

:wq!

9. Reboot

You should now be able to press "e" at the grub menu to edit the boot lines without being prompted for a password.