Every day, the world is smaller, every day, the world is more connected. From this point, cloud computing comes, a new approach of the software, infrastructure and platform as a service. In this way, our computer becomes in everything we need, in everything we want. But at the same time, this is relative new and exciting, it is undeveloped, untested and unimproved. We still dispose very few tools, systems and infrastructures. Since the rise of cloud computing, HFU has been developing CloudIA (Cloud Infrastructure and Applications), to manage clouds providing the system and the tools. From this beginning, it didn''t take a long time when a new challenge appeared, cloud computing was designed by developers and for developers, not for everyone, so here starts our way, how everyone, not only experts, can use the clouds easily, and also how the experts can personalize it, and improve it. This was our origin, and we found a great way to improve the power of the cloud, a GUI able to manage clouds really easy and friendly, through OpenNebula. Now you can use the cloud, you can create the cloud, you can be the cloud. This book will guide you to the new generation of computers.