Akeeba UNiTE is the command-line unattended backup restoration tool. It is designed in such a way to make it possible to easily create multiple sites, automate site-to-site transfers (on the same or a different server) as well as automatically restoring demo sites.
IMPORTANT! This software is designed with advanced users in mind, who are comfortable with the command line. It is a standalone command-line PHP application; it can not be installed in Joomla!.