aaron@watermelons-laptop:~$ sudo update-grub 
[sudo] password for aaron: 
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.32-22-generic
Found initrd image: /boot/initrd.img-2.6.32-22-generic
Found linux image: /boot/vmlinuz-2.6.31-21-generic
Found initrd image: /boot/initrd.img-2.6.31-21-generic
Found memtest86+ image: /boot/memtest86+.bin
done
aaron@watermelons-laptop:~$