基本的提交：https://www.cnblogs.com/jackchensir/p/8306448.html
菜鸟教程： http://www.runoob.com/git/git-basic-operations.html
配图的教程：https://www.cnblogs.com/zcynine/p/5558846.html
常见问题汇总: https://blog.csdn.net/sgsgy5/article/details/83689516
https://www.cnblogs.com/sjhsszl/p/8708471.html