提交文件
步骤1 - git init
$ git init
Initialized empty Git repository in /home/scrapbook/tutorial/.git/
$ ls -A
.git
$
执行git init后，在当前目录下，.git子目录会被创建。该子目录包含Git用于存储其信息的元数据。
步骤2 - git status
$ git status
On branch master
No commits yet
Untracked files:
(use "git add <file>..." to include in what will be committed)
hello-world.js
nothing added to commit but untracked files present (use "git add" to track
