（1）如果要下載github某個版本庫內容直接使用：
git cone https://github.com/xxoo/xx.git
or
在頁面有個Download ZIP
（2）如果自己新建了一個項目（版本庫）要提交到github上去。方法如下：
$sudo mkdir mysql
$sudo git init
Initialized empty Git repository in /opt/github/mysql/.git/
# git status
# On branch master
#
# Initial commit
#
nothing to commit (create/copy files and use "git add" to track)
$sudo ls
test.html
$sudo git status
# On branch master
#
# Initial commit
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# test.html
nothing added to commit but untracked files present (use "git add" to track)
$sudo git add test.html
$sudo git status
# On branch master
#
# Initial commit
#
# Changes to be committed:
# (use "git rm --cached <file>..." to unstage)
#
# new file: test.html
（3）如果你要添加所有文件使用：
$sudo add .
#或者使用
$sudo add *
$sudo git commit -m "第一次變更" ##表示日誌描敘信息
$git push #提交信息
圖示如下:
