Commands to Install docker on ubuntu

Docker install ubuntu 16.04

sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates
sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list
sudo apt-get update
apt-cache policy docker-engine
sudo apt-get update
sudo apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual
sudo apt-get update
sudo apt-get install docker-engine
sudo service docker start
sudo docker run hello-world

sudo groupadd docker
sudo usermod -aG docker $USER

Log out and log back in.
This ensures your user is running with the correct permissions.

docker run hello-world