Install cuda10.1 and cudnn 7.6.5 on Ubuntu 18.04

Install CUDA 10.1 and Cudnn 7.6.5 on Ubuntu18.04

# Install Cuda 10.1 and Cudnn 7.6.5 on Ubuntu 18.04  


## Start clean  
sudo apt purge nvidia*
sudo apt remove nvidia-*
sudo rm /etc/apt/sources.list.d/cuda*
sudo apt autoremove && apt autoclean
sudo rm -rf /usr/local/cuda*  

## Install some dependencies  
sudo apt install -y g++ freeglut3-dev build-essential libx11-dev libxmu-dev libxi-dev libglu1-mesa libglu1-mesa-dev  

## Add CUDA repository  
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-key adv --fetch-keys http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/7fa2af80.pub
echo "deb https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 /" | sudo tee /etc/apt/sources.list.d/cuda.list  

## Run update  
sudo apt update  

## Install Nvidia Driver 440  
sudo apt install -y nvidia-driver-440 

## Install CUDA-10.1  
sudo apt-get -o Dpkg::Options::="--force-overwrite" install cuda-10-1 cuda-drivers  

## Set CUDA paths  
echo 'export PATH=/usr/local/cuda-10.1/bin:$PATH' >> ~/.bashrc
echo 'export LD_LIBRARY_PATH=/usr/local/cuda-10.1/lib64:$LD_LIBRARY_PATH' >> ~/.bashrc
source ~/.bashrc
sudo ldconfig  

## Download Cudnn 7.6.5 for CUDa 10.1  
  - Go to https://developer.nvidia.com/cudnn  
  - Create an account  
  - Download the suitable version of Cudnn from https://developer.nvidia.com/rdp/cudnn-download  
  - Extract the downloaded file `tar -xzvf <filename>`  
  - Copy the following files into the CUDA directory  
sudo cp -P cuda/include/cudnn.h /usr/local/cuda-10.1/include
sudo cp -P cuda/lib64/libcudnn* /usr/local/cuda-10.1/lib64/
sudo chmod a+r /usr/local/cuda-10.1/lib64/libcudnn*

## Restart the PC  
Restart your PC to apply the changes

## Check that everything went the right way  
nvidia-smi
nvcc -V