chenkuntaodeMacBook-Pro:~ chenkuntao$ cd /Users/chenkuntao/Xcode/learn/KickBalliOS/KickBalliOS
chenkuntaodeMacBook-Pro:KickBalliOS chenkuntao$ touch README.md
chenkuntaodeMacBook-Pro:KickBalliOS chenkuntao$ git init
Reinitialized existing Git repository in /Users/chenkuntao/Xcode/learn/KickBalliOS/KickBalliOS/.git/
chenkuntaodeMacBook-Pro:KickBalliOS chenkuntao$ git add README.md
chenkuntaodeMacBook-Pro:KickBalliOS chenkuntao$ git commit -m "first commit"
On branch master
Untracked files:

.DS_Store
KickBalliOS/

nothing added to commit but untracked files present