Para instalar o GRUB2 no HD de um servidor fazendo uso do shell de um LiveCD, basta:
* Comandos necessitam de poderes de root.
mkdir /mnt/mychoot #mount /dev/<DISCO_ALVO> /mnt/mychroot #Atencao a correta particao mount /dev/sda1 /mnt/mychroot mount --rbind /dev /mnt/mychroot/dev mount --make-rslave /mnt/mychroot/dev mount -t proc /proc /mnt/mychroot/proc mount --rbind /sys /mnt/mychroot/sys mount --make-rslave /mnt/mychroot/sys mount --rbind /tmp /mnt/mychroot/tmp chroot /mnt/mychroot /bin/bash #grub-install /dev/<DISCO_ALVO> #Atencao a correta particao grub-install /dev/sda1 update-grub