ubuntu16.04安装cuda8.0,tensorflow-gpu版本后，运行时报错：
ImportError: libcudnn.so.5: cannot open shared object file: No such file or directory
Failed to load the native TensorFlow runtime.
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原因：tensorflow与cuda版本不匹配，试了一下
tensorflow-gpu==1.1.0对应需要cudnn5.0
tensorflow-gpu==1.4.0对应需要cudnn6.0
tensorflow-gpu==1.7.0,1.6.0,1.5.0对应需要cudnn9.0
tensorflow-gpu==对应需要cudnn9.0
安装cuda8.0需要对应安装tensorflow-gpu==1.4.1
cudnn下载地址https://developer.nvidia.com/rdp/cudnn-archive
下载cudnn5.0按照以下方法安装，6.0改成5.0
https://blog.csdn.net/Teeyohuang/article/details/79660547?utm_source=blogxgwz6