Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git is lightning fast and has a huge ecosystem of GUIs, hosting services, and command-line tools.
If you're getting started with Git, a great place to learn the basic commands is the Git Cheat sheet. It's translated into many languages, open source as a part of the github/training-kit repository, and a great starting place for the fundamentals on the command line.
Git 是 Linus Torvalds 为了帮助管理 Linux 内核开发而开发的一个开放源码的版本控制软件。 Git 与常用的版本控制工具 CVS, Subversion 等不同，它采用了分布式版本库的方式，不必服务器端软件支持。