- Pro Git chapter 1.4 covers installing git on Linux, Mac, & Windows
- StackOverflow's How to Install Git covers all the major operating systems and installation methods
- ACRL TechConnect's "Gentle Introduction to Modern Version Control" by John Fink is a good starting point for understanding version control (the type of software Git is)
- Git Ready is a nice set of command explanations, categorized "beginner," "intermediate," and "advanced"
- Code School's Try Git course (looks like a few lessons are free, later ones are paid?).
- Git-it is a command-line tutorial on both git & GitHub by GitHub employee Jessica Lord
- GitHub's Help dox are pretty good.
- How to GitHub: Fork, Branch, Track, Squash and Pull Request is a thorough walk-through of contributing to someone else's project on Github chock full of best practices like using a development branch & "squashing" commits using
git rebase
While not required knowledge to use git (see the Git GUIs below), a basic familiarity with the command line is useful in using Git and understanding what's going on.
- Command Line Basics Series by Lullabot, a team of Drupal experts
- Pro Git, a book about Git that's more accessible than its title makes it sound
Graphical software that lets you use Git without the command line.
- GitHub Desktop (you will be directed to the Mac or Windows version depending on your operating system)
- Tower
There is a list of GUIs available on the official Git website.