Is your Master Boot Record royally messed up? Who needs Live CDs? This video tutorial will show you how you can use an Ubuntu Live USB drive to do a complete reinstall of GRUB, even when your boot device is inaccessible.

Commands used in this video:
sudo mount /dev/sda5 /mnt  *****Using the linux installation on your hard drive instead of /dev/sda5
sudo mount –bind /dev /mnt/dev

sudo mount –bind /proc /mnt/proc
sudo mount –bind /sys /mnt/sys
sudo chroot /mnt
grub-install /dev/sda *****Using your boot device instead of /dev/sda
CTRL-D
sudo umount /mnt/dev
sudo umount /mnt/proc
sudo umount /mnt/sys
sudo umount /mnt

This video was produced on Linux and edited entirely using open source programs. Intro made in Ubuntu by Yazlanka – Outtro made in Blender by Wayne Tedder

Have you ever had issues with booting?

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grub2 howto tutorial Ubuntu