http://git-scm.com/book ;link to the book on git

git clone https://github.com/Username/repositoryname.git ;checks out a project from github

cd respositoryname ;change directory to repository directory

From Project Directory

git status ;checks if you have most current files

git pull ;downloads most upto date files

git add . ;Stages changes Adds all changes you made or . can be replaced with a single files name

git commit -m "your comment here" ;commits changes that were added to repository (Local Copy)

git push ;Uploads most recent changes to github server