1.把文件添加到版本库 2.时光穿梭机 3.管理修改 4.管理修改2 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 0020. i am gona to be deleted create a new branch dev: test command --no--ff modify on branch dev test command --no--ff test command --no--ff agaign test command --no--ff third test command --no--ff forth test command --no--ff fifth test command git stash fafsafafsafsa test command git stash list and git stash apply and git stash drop