nbu备份虚拟机

http://blog.sina.com.cn/s/blog_6965d96d0102viee.html

https://download.csdn.net/download/shixiaona01998/10181944

http://blog.51cto.com/3402313/1241421

https://wenku.baidu.com/view/b256fa950242a8956bece4ed.html

https://jingyan.baidu.com/article/a3aad71ac40298b1fb0096f8.html

http://blog.itpub.net/28841119/viewspace-1630972/

https://wenku.baidu.com/view/2d631dfe0242a8956bece453.html

https://wenku.baidu.com/view/bd3d4c06abea998fcc22bcd126fff705cd175c54.html