[TYPO3-linux] Some problems after Typo3 installation, page not found for the demo pages

[Andrea Nobili]

Hello to everybody,

I am very new in Typo3 (I have just installed it today) and after installation I am finding a problem.

I have installed the introductionpackage-6.1.1.zip package on my Ubuntu local system and after the installation the demo web site start.

In this demo site I have an horizontal main menu containing some items as: About Typo3, Features, Customizing Typo3, etcetc.

The problem is that if I click on these links I always obtain the following error message:

Not Found

The requested URL /introductionpackage-6.1.1/about-typo3/ was not found on this server.
Apache/2.2.22 (Ubuntu) Server at localhost Port 80

Why? What could be the problem? And I can I solve it?

Searching on google I see that seems to be a common problem but I can't find a working solution