How do I open the Joomla Control Panel?
To login to Joomla! 3 and access your administrative panel, you need to open your browser and navigate to http://mydomain.com/administrator. On this page, you will find a login screen, where you need to enter the username and password you've chosen during the Joomla!
of course there are case thta the backend is in a URL like …./administrator?<secret word> and with password
