This question is an exact duplicate of:
I am pretty new with WP (I came from Joomla) and I am finding some problem loading an old WP backup on my local Apache.
I have take the directory containint an old blog (named blog) and I have put it inside my local www directory of my Ubuntu local system.
Then I have import the database backup on my local MySql server and finally I have change the wp-config.php file changing the information about my local database.
The problem is that when I try to open the address:
in my browser it appear a withe page and I can't see no output
Why? What could be the problem? How can I try to solve it?