Changes

** .git directory

** Content Integrity, SHAs (Secure Hash Algorithm): <code>echo 'test content' | git hash-object --stdin</code>

** Blobs, Trees, and Commits

** Working Directory, Staging Area, Repository

*** <code>git clone url-to-git-repo</code>

*** <code>git add file.txt</code>

*** <code>git commit -m "Added file.txt"</code>

** Remotes, <code>origin</code>, <code>upstream</code>