So, what did this do? Well, what it did was add a [http://httpd.apache.org/docs/current/mod/core.html#serveralias ServerAlias] directive to the Apache configuration. (In MS-IIS, it's called a host header or a binding.) You can have as many ServerAlias' as you'd like. So, if you wanted to take a look under the hood, you would open a terminal window on your server (or SSH to it) and do a directory listing of '''/etc/httpd/conf.d/'''.