Building the Docker images is a critical aspect of the Docker technology for streamlining the arduous task of containerization. As indicated before, the Docker initiative has turned out to be disruptive and transformative for the containerization paradigm. Dockerfile is the most prominent way for producing the competent Docker images, which can be used meticulously. We have illustrated all the commands, their syntax, and their usage techniques in order to empower you with all the easy-to-grasp details, and this will simplify the image-building process for you. We have supplied a bevy of examples in order to substantiate the inner meaning of each command. In the next chapter, we are going to discuss the Docker Hub, which is a well-designated store for storing and sharing the Docker images, and we will also discuss its profound contribution to the penetration of the containerization concept into the IT enterprises.