Cara Mengembalikan Grub Ubuntu

> sudo -i

# fdisk -l (pilih partisi linux)

# mount -t ext4 /dev/sda? /mnt/ (? diganti dengan partisi linux)

# mount -t proc proc /mnt/proc

# mount -t sysfs sys /mnt/sys

# mount -o bind /dev/ /mnt/dev

# chroot /mnt/ /bin/bash

# grub-install /dev/sda

# update-grub