index.html does not exist/can't access login page

I am new to Omeka and have been trying to install Omeka 2.0 on my Ubuntu laptop. I have gone through the steps provided at 'http://omeka.org/codex/Install_on_Ubuntu_using_Terminal' on an Ubuntu Virtual Machine (VMware), but I have come across a number of issues:

- in the 3rd part of Step 3, when I access the /sites-available/default file to change "AllowOverride None" to "AllowOverride All", the file appears empty
- After trying to overcome this problem by filling in the 'default' file with the necessary code and restarting apache, I am unable to continue the installation process as the IP adress continues to display the apache2 ubuntu default page.

-I considered that this could be due to my inability to remove the index.html file in the 3rd part of the second step, because when I type in sudo rm /var/www/index.html it says the file does not exist.

What could be the cause of these problems, and how could I solve them?

Thank you,

Nedim Buyukyuksel

What version of Ubuntu are you using?

Those instructions are pretty old, and it's possible Ubuntu has moved some things around.

Or, it's possible you were simply editing in the wrong path. Are there any other files in /etc/apache2/sites-available?