Gfilui

After installing CUDA toolkit anc cuDNN successfully without any issues, whenever I do :

sudo ldconfig 

I get the :

/sbin/ldconfig.real: /usr/local/cuda/lib64/libcudnn.so.7 is not a symbolic link

error message.

what is the reason and how can I resolve this?

By the way, I have installed cuDNN like this :

 # cuDNN
 tar xvf cudnn*.tgz
 sudo cp lib64/* /usr/local/cuda/lib64
 sudo cp include/* /usr/local/cuda/include

The output of ls -lha libcudnn* in /usr/local/cuda/lib64 is as follows:

breeze@breeze:/usr/local/cuda/lib64$ ls -lha libcudnn*
-rwxr-xr-x 1 root root 275M آوریل 15 12:03 libcudnn.so
-rwxr-xr-x 1 root root 275M آوریل 15 12:03 libcudnn.so.7
-rwxr-xr-x 1 root root 275M آوریل 15 12:03 libcudnn.so.7.0.5
-rw-r--r-- 1 root root 268M آوریل 15 12:03 libcudnn_static.a

Thanks to dear God I found the solution using this link.

This may happen when you run sudo ldconfig after copying cuDNN files.

After installing cuDNN, copying the extracted files to
/usr/lib/cuda/lib64 and creating the symlinks, things may go wrong
with the symlinks.

So go to /usr/local/cuda/lib64/ and run ls -lha libcudnn*.

You should see two symlinks (bold teal) and one single file. Something
like this:

/usr/local/cuda/lib64$ ls -lha libcudnn*
lrwxrwxrwx 1 root root 13 Dez 25 23:56 libcudnn.so -> libcudnn.so.5
lrwxrwxrwx 1 root root 17 Dez 25 23:55 libcudnn.so.5 -> libcudnn.so.5.1.5
-rwxr-xr-x 1 root root 76M Dez 25 23:27 libcudnn.so.5.1.5

The exact version of libcudnn.so.5.1.5 maybe be a little different for
you (maybe libcudnn.so.5.1.10). In that case, adapt the code
accordingly

If libcudnn.so and libcudnn.so.5 are not symlinks then this is the
reason why you got this error. If so, this is what you need to do:

/usr/local/cuda/lib64$ sudo rm libcudnn.so
/usr/local/cuda/lib64$ sudo rm libcudnn.so.5
/usr/local/cuda/lib64$ sudo ln libcudnn.so.5.1.5 libcudnn.so.5
/usr/local/cuda/lib64$ sudo ln libcudnn.so.5 libcudnn.so
Run sudo ldconfig again and there should be no errors

After running the
ls -lha libcudnn* in /usr/local/cuda/lib64 and seeing :

breeze@breeze:/usr/local/cuda/lib64$ ls -lha libcudnn*
-rwxr-xr-x 1 root root 275M آوریل 15 12:03 libcudnn.so
-rwxr-xr-x 1 root root 275M آوریل 15 12:03 libcudnn.so.7
-rwxr-xr-x 1 root root 275M آوریل 15 12:03 libcudnn.so.7.0.5
-rw-r--r-- 1 root root 268M آوریل 15 12:03 libcudnn_static.a

I had to do :

breeze@breeze:/usr/local/cuda/lib64$ sudo rm libcudnn.so
[sudo] password for breeze: 
breeze@breeze:/usr/local/cuda/lib64$ sudo rm libcudnn.so.7
breeze@breeze:/usr/local/cuda/lib64$ sudo ln libcudnn.so.7.0.5 libcudnn.so.7
breeze@breeze:/usr/local/cuda/lib64$ sudo ln libcudnn.so.7 libcudnn.so
breeze@breeze:/usr/local/cuda/lib64$ sudo ldconfig

And everything is back to normal:)