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Thus we expect readers are already comfortable with navigating a filesystem and running basic commands in such an environment.  You can find directions for installing Git for the operating system running on your computer by following one of the links provided in Table 1.  There are many graphical user interfaces (GUIs) available for running Git (Table 1), which we encourage you to explore, but learning to use Git on the command line is necessary for performing more advanced operations and using Git on a remote machine.  For the purposes of this tutorial, we'll imagine we have a subdirectory folder  in our home directory named \verb|thesis|, which contains three files. \verb|process.sh| runs some common bioinformatics tools on our raw data, \verb|clean.py| removes bad samples and combines the data into a matrix, and \verb|analyze.R| runs a statistical test and plots the result.  To start versioning your code with Git, navigate to your newly created or existing project directory (in this case, \verb|~/thesis|).