Edit the file '.htaccess', or create it if it does not exist already.
In .htaccess, add the following line:
Code:
ReadmeName whatever.html
Create the file 'whatever.html' in the same directory; put whatever you want in it. (You can change the name.. Obviously.. )
That should do it.
I tested it out quickly to make sure that mod_autoindex was enabled/supported by the server, and it is. If you leave the file empty, it will just appear to remove that 'Apache server' text.
If you're using cPanel, go to the file manager, move to the directory you want to create the file in, then click the link that says 'create new file.' A box will appear on the right, enter '.htaccess' into that box and hit the submit button, and it will create the file.