diff

git diff 命令比较文件的不同，即比较文件在暂存区和工作区的差异。 git diff 命令显示已写入暂存区和已经被修改但尚未写入暂存区文件的区别。

命令	解释
git diff	查看尚未缓存的改动
git diff --cached	查看已缓存的改动
git diff HEAD	查看已缓存的与未缓存的所有改动
git diff --stat	显示摘要而非整个 diff
git diff [file]	显示暂存区和工作区的差异
git diff --cached [file] 或者git diff --staged [file]	显示暂存区和上一次提交(commit)的差异
git diff [first-branch]...[second-branch]	显示两次提交之间的差异

git status 显示你上次提交更新后的更改或者写入缓存的改动， 而 git diff 一行一行地显示这些改动具体是啥。