.htaccess (Hypertext Access)
The name .htaccess refers to the main configuration file for Apache, a popular open-source HTTP server. The .htaccess file can be used to create custom error pages and web page redirects, set up password protection, enable SSI, and more. Yahoo! does not currently allow you to upload .htaccess files to your account. For other customization options, we recommend the Custom Error Pages and password-protection features available in your Web Hosting Control Panel.
What is the point, Yahoo, of telling us all the great things you can do with .htaccess and then tell us it can’t be done on your crappy hosting?