Git is an open source distributed version control system that allows for branching, committing changes, and rolling back changes. It is distributed, so users can work offline and sync changes later. Users can initialize local repositories from existing remote ones using cloning. Basic commands include add, commit, log, checkout, merge, and rebase to manage branches and integrate changes.

1. Git
distributed version control system
Wei-Tsung Lin

2. Introduction
● Git is a open source distributed version
control system designed to handle
everything from small to large projects with
speed and efficiency.
● Create a branch to test new features,
commit many times, and roll back to where
you branched from.
● Have a master branch that contains only the
content go to the production, another that
you merge work for testing, and several tiny
changes for nightly build.

3. Distributed
● Git is a distributed system, which means that
instead of doing "checkout" of source code
every times, you can have your own clone of
the entire repository.
● You can work on the projects without
Internet, and then commit your works after
you get connection.
● Only "add" action is implemented, so you
can restore everything which has existed in
your repository.

4. Enviroment
● You can get Git from most package manager
in Linux system.
● Under Windows, you can use MSysGit.
● git config --global user.name "name"
● git config --global user.email "email"
● git config --global apply.whitespace nowarn
● git config --global color.ui true

5. Initialize
● Create new repository
Find a empty directory, and execute
command: "git init", initialize empty Git
repository in directory ".git".
● Clone a repository
Command: "git clone url"

6. Basic usage
touch README git add README git commit -m "README"
unstage stage commit

7. Commit log
● Console: git log
● Windows: TortoiseGit
● Linux:
giggle
● Mac:
GitX

8. Branch
● Commits are Identified by SHA.
● Master means which branch we are working
on.
● "git checkout" to change branch

9. Example

10. Merge
git checkout master
git merge issue1

11. Rebase
git checkout hotfix
git rebase master

12. Reference
http://progit.org/