1 报错内容
在ubuntu系统下，报错信息如下所示：
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_ops_infer.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_infer.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_ops_train.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_train.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_train.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8 is not a symbolic link
这个问题是符号链接导致的，我们对报错的链接重新定位即可。
2 问题解决
首先打开一个终端，cd到上述报错文件所在目录下，比如我这里是：
cd /usr/local/cuda-11.0/targets/x86_64-linux/lib
然后，执行ls查看一下该目录下的文件：
ls
输出有很多，我这里截取其中一小部分：
然后，我们需要对出错的链接进行重定位。比如我上述报错的第一条内容是/usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_ops_infer.so.8，而从上图中可以看到，我有个libcudnn_ops_infer.so具体版本为libcudnn_ops_infer.so.8.0.4，那么，第一个软链接的重定位命令为：
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_ops_infer.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_ops_infer.so.8
同上，对所有出问题的文件重新链接即可：
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_ops_train.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_ops_train.so.8
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_train.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_train.so.8
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_train.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_train.so.8
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn.so.8
要检查是否已经全部修改好了，可以执行：
ldconfig
进行检查，比如我这里在执行完上述这些命令后，输出为：
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_infer.so.8 不是符号链接
/sbin/ldconfig.real: /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_train.so.8 不是符号链接
也就是还有这两个未解决，对应解决即可：
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_infer.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_infer.so.8
sudo ln -sf /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_train.so.8.0.4 /usr/local/cuda-11.0/targets/x86_64-linux/lib/libcudnn_cnn_train.so.8
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