In the previous chapters, we discussed topics such as network authentication, monitoring and optimizing your Ubuntu Server, process management, shell management, and user management. Then, we saw the virtualization techniques in Ubuntu. In this chapter, we will study OpenStack, which is the open source solution for cloud computing. First, we will look at the architecture of OpenStack and the different components that make up the complete system. Then, we will look at an example environment that will help in installing the OpenStack components, networking them, and setting up the security. In the later parts of this chapter, we will see how to install the different components that will make up a complete OpenStack system. So let's begin the journey.