Install CUDA Toolkit v8.0 and cuDNN v6.0 on Ubuntu 16.04

waya-dl-setup.sh

#!/bin/bash

# install CUDA Toolkit v8.0
# instructions from https://developer.nvidia.com/cuda-downloads (linux -> x86_64 -> Ubuntu -> 16.04 -> deb (network))
CUDA_REPO_PKG="cuda-repo-ubuntu1604-8-0-local-ga2_8.0.61-1_amd64.deb"
wget https://developer.nvidia.com/compute/cuda/8.0/Prod2/local_installers/${CUDA_REPO_PKG}
sudo dpkg -i ${CUDA_REPO_PKG}
sudo apt-get update
sudo apt-get -y install cuda

# install cuDNN v5.1
CUDNN_TAR_FILE="cudnn-8.0-linux-x64-v5.1-tgz"
wget https://developer.nvidia.com/compute/machine-learning/cudnn/secure/v5.1/prod_20161129/8.0/${CUDNN_TAR_FILE}
tar -xzvf ${CUDNN_TAR_FILE}
sudo cp  cuda/include/* /usr/local/cuda/include
sudo cp  cuda/lib64/* /usr/local/cuda/lib64/

# set environment variables
export CUDA_HOME=/usr/local/cuda-8.0
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CUDA_HOME/lib64:$CUDA_HOME/extras/CUPTI/lib64
export PATH=$CUDA_HOME/bin:$PATH

#Necessary:

#sudo apt-get install libcupti-dev
#conda create -n tensorflow python=3.6
# wget https://storage.googleapis.com/tensorflow/linux/gpu/tensorflow_gpu-1.3.0-cp35-cp35m-linux_x86_64.whl
# pip install tensorflow_gpu-1.3.0-cp35-cp35m-linux_x86_64.whl

Check CUDA toolkit versions
https://developer.nvidia.com/cuda-toolkit-archive

Unable to uninstall cuda 9.0 completely and install 8.0 instead

https://devtalk.nvidia.com/default/topic/1024342/cuda-setup-and-installation/unable-to-uninstall-cuda-9-0-completely-and-install-8-0-instead/

Found the solution:

I reinstalled nvidia-381, CUDA-8.0 (using the runfile) and cuDNN 6.0. Then I added the following in my .bashrc:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/cuda/lib64/

sudo apt install nvidia-cuda-dev