https://developer.nvidia.com/cudnn
注册和问卷部分省略
下载cuDNN v7.0.4 Library for Linux
不是for Ubuntu 16.04那个
下载好后：
cd ~/下载
tar zxvf cudnn-9.0-linux-x64-v7.tgz
cd ~/下载/cuda/include
sudo cp cudnn.h /usr/local/cuda/include/
cd ~/下载/cuda/lib64
sudo cp libcudnn* /usr/local/cuda/lib64/
sudo chmod a+r /usr/local/cuda/include/cudnn.h /usr/local/cuda/lib64/libcudnn*