Installing a new Typo3 website
If you want to install the a clean TYPO3 site in your webserver, all you have to do is go to http://typo3.org/download/packages/ and download a Blank Package, unzip it and move the contents to the root folder (lets call it htdocs).
Now access the shell of your server write the next 2 command:
sudo chown root:www-data -R htdocs sudo chmod -R 775 htdocs
Now you can simply access the website through your web browser and the install process will start for you.
It may be possible that you need to create manually a file ENABLE_INSTALL_TOOL in the typo3conf folder
sudo touch htdocs/typo3conf/ENABLE_INSTALL_TOOL