Install Grub in a chroot environment
Image you destroyed your MBR sector of your hard drive/flash device and you are not able to load grub. You can easily fix this issue from an other Linux based computer. Simply run the following commands: mount /dev/sda1 /mnt/ mount -t proc none /mnt/proc mount -o bind /dev /mnt/dev chroot /mnt/ /bin/bash /usr/sbin/grub-install –recheck –no-floppy /dev/sda With this routine it it is also possible to fix UUID problems.