root@ubuntu:/# grub-install --recheck /dev/sda
Installation finished. No error reported.
root@ubuntu:/# update-grub
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.2.0-31-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-31-generic-pae
Found memtest86+ image: /boot/memtest86+.bin
done