自动制linux iso包

https://blog.51cto.com/misliang/1610670

https://zhuanlan.zhihu.com/p/47926853

https://www.joe0.com/2015/11/14/how-to-create-a-bare-metal-iso-image-backup-of-a-liverunning-linux-server-centos-7-instructions/

https://blog.csdn.net/zhang20080528yeahnet/article/details/112607824