sudo apt install nvidia-390

sudo dpkg -i cuda-repo-ubuntu1604_9.0.176-1_amd64.deb
sudo apt-key adv --fetch-keys http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/7fa2af80.pub
sudo apt-get update
sudo apt-get install cuda

$ sudo apt install cuda
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package cuda

dpkg -l | grep '^rc' | awk '{print $2}' | sudo xargs dpkg --purge