An unattended installation via AutoYaST is executed by specifying the following boot parameter:
autoyast=<URL to AutoYaST control file>
This parameter is recognized by the initrd and the execution process changes its direction. Instead of prompting administrators for various system settings, the control file located at the specified URL is parsed by YaST modules and the installation proceeds unattended by using all of the instructions defined in the AutoYaST control file.