https://www.jianshu.com/p/2fe22a6b0ecb
https://www.jianshu.com/p/b1be2af2f2ef
https://blog.csdn.net/wuyuqing1990/article/details/48167555 虚拟机
https://blog.csdn.net/qq_35370485/article/details/77844860
https://www.58jb.com/html/115.html /opt/pydev
sudo mount -t vboxsf shared /home/rosy/shared
~/.keras/keras.json：backen修改为tensorflow，tensorflow就会使用所有的gpu
