To install Git, simply go to the URL mentioned earlier and download the .exe file for Windows, or on Ubuntu, run the following command:
sudo apt-get install git
For other flavors of Linux, check the package-management system. Having installed Git, you now need to set up a new project within RStudio. A version-control with Git (or SVN, a different version-control system, which we will not consider here) is only possible when we use a project within RStudio.