Cannot locate cudnn samples

I have installed libcudnn7 using debian and I have seen in:

$ dpkg --list | grep libcudnn    
ii  libcudnn7                                                      amd64        cuDNN runtime libraries

but I cannot locate /usr/src/cudnn_samples_v7 in my system

$ cp -r /usr/src/cudnn_samples_v7/ $HOME
cp: cannot stat '/usr/src/cudnn_samples_v7/': No such file or directory

Here is my system:

| NVIDIA-SMI 440.64.00    Driver Version: 440.64.00    CUDA Version: 10.2     |
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|   0  GeForce GTX 1050    On   | 00000000:01:00.0 Off |                  N/A |
| N/A   51C    P0    N/A /  N/A |   4022MiB /  4040MiB |      4%      Default |

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2017 NVIDIA Corporation
Built on Fri_Nov__3_21:07:56_CDT_2017
Cuda compilation tools, release 9.1, V9.1.85



You need to install “cuDNN Code Samples and User Guide for Ubuntu18.04 (Deb)” or “cuDNN Code Samples and User Guide for Ubuntu16.04 (Deb)” to get the cuDNN samples.
Please refer to cuDNN download page: