It is expected that you have basic knowledge of installing software on the platform that you use regularly. However, it is helpful to have an overview of some technical aspects of installing R and the integrated development environment (IDE) such as RStudio. This chapter will serve as a reference point for the technical issues during installation and configuration of R and its libraries for Windows and Linux platforms. Each of the recipes contains detailed description with the necessary screenshots so that you feel very comfortable, even if you are not in front of your computer. After completing all the recipes of this chapter, you will be confident enough to install R and its libraries in Windows and Linux platforms. So, let’s get started.