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.