Install grub2 by entering the following commands in the terminal:
sudo apt update sudo apt install grub2
Description:
GRand Unified Bootloader, version 2 (dummy package)
This is a dummy transitional package to handle GRUB 2 upgrades. It can be safely removed.
Homepage: http://www.gnu.org/software/grub/
Version: 2.02-2ubuntu8
Section: universe/admin