Repairing a Broken GRUB 2 Boot-Loader on Ubuntu

Link: http://techgage.com/news/repairing_a_broken_grub_2_boot-loader_on_ubuntu/
Quote: There’s no question that GRUB 2 brought on numerous improvements over earlier versions, but it also introduced a small downside… a relative overhaul to how things are done. There are no more menu.1st (or similar) files that keep a simple configuration, nor are all of the commands the exact same at the command-line. You might have been an expert with GRUB 0.x, but you’ll still face a small learning-curve with GRUB 2.