查看 CUDA cudnn 版本

https://medium.com/@changrongko/nv-how-to-check-cuda-and-cudnn-version-e05aa21daf6c

https://blog.csdn.net/zhangjunhit/article/details/76532196

cuda 版本 

cat /usr/local/cuda/version.txt

cudnn 版本 

cat /usr/local/cuda/include/cudnn.h | grep CUDNN_MAJOR -A 2