If you find yourself with a possible missing "/".
Solution:
1. Boot from an Ubuntu Live CD
2. Open Terminal
3. Type: sudo fdisk -l then press ENTER
Make note of the "Boot" indicator "*" for the correct device.
Device Boot Start End Blocks Id System
/dev/sda1 * 1 30238 242886703+ 83 Linux
/dev/sda2 30239 30401 1309297+ 5 Extended
/dev/sda5 30239 30401 1309266 82 Linux swap / Solaris
4. Type: sudo fsck /dev/sda1 then press ENTER
5. Restart the system and boot normally.
