Remove grub password

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Remove grub password allowing you to edit grub lines.

1. Boot vm from Red Hat or Centos cd

2. Select "Troubleshooting" from the menu

Troubleshooting2.jpg

3. Select the "Rescue" option from the menu

Rescue.jpg

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

Continue.jpg

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

/mnt/sysimage/boot/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"

password --md5 $hgUjKUFhedfa$0947$hFgrjdjskwkel34dGhyTreefgj.nGr4Y..

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.