I post before Article talking about “Hack Root Password With Protected Grub” Here .
But what if GRUB was Locked By password and you forget Root Password, There’s always away to do it but you need the same media for Operating system ( Never tried to use different distribution ) after boot :
In the above screen Type ” linux rescue ” and then Press enter
After follow the instruction and Enter Bash
chroot /mnt/sysimage [Enter]
cd /boot/grub [Enter]
vi menu.lst
Now In that file you see word “Password” Remove Line, This will remove Grub password after save it the OS will Reboot but this time Grub will be UN-Protected , Remove CD and follow the normal instruction in Article Number one Here.
Thank you
Osama Mustafa
Technology Geek 
That's easy to steal passwords using simplest keylogger. You can just install it sneakily and get access to any required account.
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