GRUB Bootloader Reinstall

Updated 1,844 Days AgoPublic

Actions

Oh no, GRUB kicked the bucket! Luckily for you, your professor just went over Frankenstein last week, so you can say that you're somewhat of an expert with reviving the dead. :^)

1 - Boot into a live Linux disk
2 - Open a terminal: ( ⌃ + ALT + T )
3 - Become root sudo su
4 - Run fdisk -l to find out where Linux is installed in the drive you're working on. It should look something like so:

mount --bind /proc /mnt/proc 
mount --bind /sys /mnt/sys 
mount --bind /dev /mnt/dev

6 - Now we want to work inside of what we've mounted, ergo: chroot /mnt
7 - Reinstall GRUB:

grub-install /dev/sdX
update-grub /dev/sdX
update-grub2 /dev/sdX

NOTE: in this case, we're installing it to /dev/sda

8 - Unmount everything previously mounted:

umount /mnt/proc
umount /mnt/sys
umount /mnt/dev
umount /mnt

9 - Revel in the fruits of your labor and reboot