With an .htaccess file, you'll determine how the server that manages the requests to your Internet sites must act a number of cases. This is a text file with directives that are executed when somebody tries to open your website and what happens next depends on the content of the file. For instance, you could block a particular IP address from accessing the website, and the server will decline the visitor’s request, or you can forward your domain to a different URL, so the server may redirect the visitor to the new web address. You may also use customized error pages or shield any part of your website with a password, if you place an .htaccess file inside the correct folder. Many well-known script-driven apps, including Joomla™, Drupal™ and WordPress, use an .htaccess file to function efficiently.