linux下的dd命令来自于coreutils：http://www.gnu.org/software/coreutils/
https://jingyan.baidu.com/article/d45ad148e203f969552b800a.html
在win10的Bash on Ubuntu on Windows下也支持dd命令，但是不支持/dev/sdb
dd if=/mnt/d/OS/CentOS-7-x86_64-DVD-1503-01.iso of=/mnt/e bs=2M
https://stackoverflow.com/questions/38954691/is-usb-supported-on-bash-on-ubuntu-on-windows-10
https://wpdev.uservoice.com/forums/266908-command-prompt-console-bash-on-ubuntu-on-windo/suggestions/13396686-access-to-real-linux-devices-in-dev