hieupmm2096

mount /dev/mapper/fedora-root /mnt
mount /dev/sda3 /mnt/boot
mount -B /dev /mnt/dev
mount -B /proc  /mnt/proc
mount -B /sys /mnt/sys
chroot /mnt
grub2-install /dev/sda
grub2-mkconfig -o /boot/grub2/grub.cfg
exit
reboot