A-Linux中cat xxx | split -b 2G - xx.B-win7中copy /B xx.aa + xx.iso.ab + xx.iso.ac xx_big
分割合并参考:https://blog.csdn.net/qq_36396104/article/details/82688286
文件校验参考:https://www.cnblogs.com/andy9468/p/11239641.html