The simplest way to install Cloudmin is to use the install script on the serial numbers page that matches your system. The steps to follow are :
From this point on, installation should be fully automated. Cloudmin packages, Webmin and other tools will be download from the appropriate repositories using APT or YUM.
Once the installation is complete, you can login via the URL https://mastersystem:10000/ . See the Getting Started with Cloudmin page for what to do next.