ERROR: libcudnn_adv_infer.so.8 is not a symbolic link
ubuntu18.04报错：
/sbin/ldconfig.real: /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda/targets/x86_64-linux/lib/libcudnn.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_cnn_infer.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_ops_train.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_cnn_train.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_ops_infer.so.8 is not a symbolic link
/sbin/ldconfig.real: /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_train.so.8 is not a symbolic link
解决办法：
先检查一下已经安装的版本
ls /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_train.so.8*
/usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_train.so.8 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_train.so.8.3.1
ＯＫ，也就是说我们的libcudnn是8.3.1版。
接下来进行下面的操作
sudo ln -sf /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8.3.1 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_infer.so.8
sudo ln -sf /usr/local/cuda/targets/x86_64-linux/lib/libcudnn.so.8.3.1 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn.so.8
sudo ln -sf /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_cnn_infer.so.8.3.1 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_cnn_infer.so.8
sudo ln -sf /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_ops_train.so.8.3.1 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_ops_train.so.8
sudo ln -sf /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_cnn_train.so.8.3.1 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_cnn_train.so.8
sudo ln -sf /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_ops_infer.so.8.3.1 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_ops_infer.so.8
sudo ln -sf /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_train.so.8.3.1 /usr/local/cuda/targets/x86_64-linux/lib/libcudnn_adv_train.so.8