Something Goes Wrong Before Ubuntu Finishes Booting
Boot problems are especially awkward—if Ubuntu won't start, how can you access the software you need to fix the problem? To get around this particular annoyance, you might need to start the computer from a live CD (like the one included with this book) or use some special options to help the process along.
This section covers the two most common classes of boot problems, GRUB errors and kernel problems. There's some general advice for other types of boot problem too, including tips for dual-booters struggling to get Windows to start.
I Get a GRUB Error
When you try to start your computer, you might be left with a black screen, which says that there was a GRUB error. This means there is a problem ...