shell脚本进阶之条件语句
条件选择if语句
https://www.runoob.com/?s=shell&page=1
https://www.cnblogs.com/flylinux/p/7576904.html
https://blog.csdn.net/zhan570556752/article/details/80399154
shell脚本进阶之循环语句
https://www.cnblogs.com/EasonJim/p/8315939.html
https://blog.csdn.net/yugemengjing/article/details/82469785