学习CS61B的一开始，会有lab里面讲git tutorial。这里做一个总结。
CS61B Lab1:
https://sp18.datastructur.es/materials/lab/lab1/lab1#b-git--local-repos
Using git:
https://sp18.datastructur.es/materials/guides/using-git.html
| command | description |
|---|---|
| git init | Initialization |
| git add (d: file) | add tracking file |
| git status | check status |
| git commit -m “message you want to record” | commit |
| git log | list the whole log |
| git show (passcode) | show the details |
| git checkout (passcode) (directory) | get the odd staff back but the log is still stored |