Removed grub by accident from via apt

Question

I removed grub fully via apt

 sudo apt purge grub-pc grub-common

I was going to reinstall via apt

 sudo apt install grub-pc grub-common

but my UPS failed and the PC shut-down. Now I am stuck. No grub nothing. Live cd shows no /boot/grub/grub.cfg

What to do?

Thanx in advance.

Answer 1

• Backup
• Boot from live CD, DVD or USB drive

• Mount the partition your Ubuntu Installation is on. If you are not sure which it is, launch GParted (included in the Live CD) or open a terminal (Ctrl+Alt+T) and use the following command:

  sudo fdisk -l
  

  and find out. It is usually a EXT4 Partition. Replacing the XY with the drive letter, and partition number, run these commands:

  sudo mount /dev/sdXY /mnt
  sudo mount /dev/sdXZ /mnt  
  sudo mount --bind /dev /mnt/dev 
  sudo mount --bind /proc /mnt/proc 
  sudo mount --bind /sys /mnt/sys 
  sudo chroot /mnt 
  sudo apt install grub-pc grub-common
  sudo grub-install /dev/sdX
  sudo update-grub
  exit
  sudo umount /mnt/dev 
  sudo umount /mnt/proc 
  sudo umount /mnt/sys 
  sudo umount /mnt
  

• Shut down and turn your computer back on, and you will be met with the default Grub2 screen.