I have cloned my HDD to an external HDD and now I need to install GRUB to make the external HDD bootable.
The external HDD is meant as a mirror backup for my current HDD (I mean that once the external HDD is bootable, I will place it into my PC and boot it; I am not going to boot from the mirror backup while keeping it into its external enclosure).
As far as I know, the standard procedure to install GRUB is to place the HDD into your PC and boot with a live CD, but I would rather using a live CD and do everything from my existing Linux installation. Is this is possible?