Though explaining cloud computing is not in the scope of this book, I will explain it in just one paragraph. Any business, big or small, needs hardware infrastructure and different software installed on it. An operating system is the basic software needed, along with different servers (from a software perspective) for storage, mail, Web, database, DNS, and so on. The list of software frameworks/platforms needed might end up being large. The point of interest here is that the initial budget for this hardware and software platform is high; we are not even considering the real estate needed to host it. This is where cloud computing providers such as Amazon, Rackspace, Google, and Microsoft come into play. They have hosted high-end hardware and software in different data centers across the globe and let us choose from different configurations to start an instance. Then, this is accessed remotely over the public network for management purposes. Literally, all our setup is done in...