That's the way I've set up the two wikis I take care of. In this case, LocalSettings.php is the "traffic cop" redirecting the traffic to the relevant config file (in this case, wikiALocalSettings.php and wikiBLocalSettings.php): Here's my /usr/share/mediawiki/LocalSettings.php : <?php $callingURL = strtolower($_SERVER['REQUEST_URI']); //the requesting url if ( strpos( $callingURL, 'wikiA') ) { require_once('wikiALocalSettings.php'); } else if ( strpos( $callingURL, 'wikiB') ) { require_once('wikiBLocalSettings.php' ); } ?> Set httpd aliases to /wikiA and /wikiB to the mediawiki installation directory, like this: Alias /wikiA /usr/share/mediawiki <Directory /usr/share/mediawiki> AllowOverride Options Options FollowSymLinks # Short URL RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.+)$ /wikiA/index.php?title=$1 [PT,L,QSA] </Directory> I use the same extension directory for both instances but different directories for uploads. Hope it helps Claude Dennis Carr a écrit :