MBR/DOS:
# Mount root partition: #your root partition, e.g. /dev/sda1 sudo mount /dev/sdX# /mnt # If you have a separate boot partition you'll need to mount it also: sudo mount /dev/sdX# /mnt/boot # Mount your virtual filesystems: for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done # Chroot sudo chroot /mnt #sudo arch-chroot /mnt # Install grub sudo grub-install /dev/sdX grub-mkconfig -o /boot/grub/grub.cfg