You cannot complete your Ubuntu Linux installation and see an error message like this:
Failed to start the X Server (your graphical interface). It is likely that it is not set up correctly. Would you like to view the X Server output to diagnose the problem?
Then, you are given a “Yes” or “No” option, and you [...]

Have you ever seen files that end with .001, .002 …as the file extension? These files are actually separated from one whole file for easy distribution / storage. Most of the time you will see such files when you are downloading files from Rapidshare or MegaUpload or other file hosting service.
They look something like this:

HJSplit [...]