进入携程的第一件事是学习git，以前虽然接触过，但没有深入的理解，git的原理、一些概念和workflow是这次学习的重点，目标是熟练使用git，完全掌握git。今天先记一些预习内容吧。以后会持续更新关于git的内容。
Two funny rules in using GIT
1、the best way to grasp these complicated git commands
After use the command at least seven times,it will begin to stay in your brain.
2、Don't use a screwdriver like a hammer
With enough flags you can force Git to act the way you think it should instead of the way it wants to,but that's like using a screwdriver like a hammer,it gets the job done,but it's done poorly,takes longer,and damages the screwdriver.