It allows running and administering multiple blogs on the same domain and on a single WordPress installation.
Download and unzip the WordPress MU package. The unzipped files will be created in a directory named "wordpressmu" followed by a version number.
Create a database for WordPress MU on your web server, as well as a MySQL user who has all privileges for accessing and modifying it.
Place the WordPress MU files in the desired location on your web server: If you want to integrate WordPress MU into the root of your domain, move or upload all the files and directories of the unzipped WordPress MU directory into the root directory of your web server; If you want to have your WordPress MU installation in its own subdirectory on your web site, rename the directory wordpressmu to the name you'd like the subdirectory to have and move or upload it to your web server.
Make sure your install directory and the wp-contents directory are writeable by the webserver.
Run the WordPress MU installation script by accessing index.php (depending on your installation location) in your favorite web browser.
Key features "WordPress MU":
· Everything WordPress does
· Scaling to tens of millions of pageviews per day.
· Unlimited users and blogs.
· Different permissions on different blogs.
· Apache mod_rewrite
· 32MB or 64MB PHP memory limit
· PHP GLOBAL variables OFF
Top 4 Download periodically updates information of WordPress MU 2.6.5 script from the developer, but some information may be slightly out-of-date.
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