You've stated that you're navigating to "http://localhost/drupal7b3", but that the directory name is "/drupal7/", so there is some incorrect information in your post.
If I'm understanding what you posted correctly (and taking into account that some of the information you presented is inconsistent), your web server is configured to show "/var/www/html" as it's root, which is represented in your browser as "http://localhost/".
In the "/var/www/html" path you have the "drupal7" directory, so that navigating to "http://localhost/drupal7" gives you the actual Drupal installation, using the default Drupal configuration found in Drupal's "/sites/default/" directory.
"http://localhost/site_au" shows "Not Found" because you don't have the "/var/www/html/site_au" path on your computer (that is also why you're getting the first error in your "/var/log/httpd/site_au.org-error_log" file. You also don't have the "site_au" directory in the "/var/www/html/drupal7" directory, nor do you have Drupal configured to use the "site_au" path for anything, which is why you're getting the second error in your Apache log.
Drupal isn't going to use the configuration in "/drupal7/sites/site_au.org", since Apache isn't configured to serve "http://site_au.org".
It will be easier to help you if you tell us what you're trying to do. I can't tell you what to do, because it seems you are trying to go down two different paths simultaneously, and I don't know which one you actually want.
Also, if you're really using Drupal 7 beta 3, you should stop what you're doing, remove it now, download and install Drupal 7.0 from http://drupal.org/project/drupal, and start over from there.
On Sat, 09 Apr 2011 16:39:07 +1000 Unknown arelem@bigpond.com wrote:
I have Fedora 14, fresh installation of Drupal 7beta3 in it's own mysql database I set up new mysql 'site' database.
Firefox http://localhost/drupal7b3 dispalys but http://localhost/site_au shows "Not Found" the requested url was not found on this server.
Seems that Drupal 7 is not seeing the new directory
/etc/hosts has 127.0.0.1 site_au.org localhost
/etc/httpd/conf/httpd.conf has: NameVirtualHost *:80 ###----------------------drupal au site-----# <VirtualHost *:80> DocumentRoot "/var/www/html" ServerAdmin webmaster@localhost ServerName site_au.org:80 ErrorLog logs/site_au.org-error_log CustomLog logs/site_au.org-access_log common
</VirtualHost>
As per tutorial the new site is /drupal7/sites/site_au.org
/drupal7/sites/sites.php has: $sites['localhost.site_au'] = 'site_au';
settings.php is a copy of /sites/default/settings.php and is in the folder drupal7/sites/site_au.org
/var/log/httpd/site_au.org-error_log reports: [Sat Apr 09 15:27:38 2011] [error] [client 127.0.0.1] File does not exist: /var/www/html/site_au [Sat Apr 09 15:30:15 2011] [error] [client 127.0.0.1] File does not exist: /var/www/html/drupal7/site_au
What have I overlooked or done incorrectly please Help much appreciated Roger