Git学习（十）查看更改记录

1、在git add添加前，查看未提交的更改：git diff

2、使用git add . 添加文件到缓冲区(staging area)后再次查看变化：
git diff --cached //看到add之后的更改
git diff --staged //看到还是上次放到缓冲区的内容
git diff HEAD //是git diff和git diff --cached的合并。

参考：
https://blog.csdn.net/toopoo/article/details/88874027