CUDA cuDNN

Hello Everyone!
Iam trying to run yolov4 in my GPU for that i need to use cudnn but when i need to know the cuda architecture version to check this i used nvidia-smi command but it says bash: nvidia-smi: command not found

NVIDIA CUDA: YES (ver 10.2, CUFFT CUBLAS FAST_MATH)
– NVIDIA GPU arch: 102
– NVIDIA PTX archs:

– cuDNN: NO

– OpenCL: YES (no extra features)
– Include path: /home/tunga/opencv/3rdparty/include/opencl/1.2
– Link libraries: Dynamic load

– Python (for build): /home/tunga/.virtualenvs/opencv_cuda/bin/python3

– Java:
– ant: NO
– JNI: NO
– Java wrappers: NO
– Java tests: NO

– Install to: /usr/local



– Configuring done
– Generating done
– Build files have been written to: /home/tunga/opencv/build

How to Make cuDNN to YES…
Thanks in advance!!!