ubuntu@ubuntu:~$ sudo mount /dev/sda6 /mnt
ubuntu@ubuntu:~$ sudo mount --bind /dev /mnt/dev &&
> sudo mount --bind /dev/pts /mnt/dev/pts &&
> sudo mount --bind /proc /mnt/proc &&
> sudo mount --bind /sys /mnt/sys
ubuntu@ubuntu:~$ sudo chroot /mnt
root@ubuntu:/# ^C
root@ubuntu:/# grub-install /dev/sdX
grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
root@ubuntu:/# grub-install /dev/sd6
grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
root@ubuntu:/# ls -ahl /usr/lib/grub/i386-pc/modinfo.sh
ls: cannot access '/usr/lib/grub/i386-pc/modinfo.sh': No such file or directory
root@ubuntu:/# grub-install /dev/sda6
grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
root@ubuntu:/# grub-install /dev/sda6/
grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.