Docker installation for Ubuntu 16.04

Install Docker

sudo apt-get update
sudo apt-get install -y 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
#sudo apt-get install -y linux-image-extra-$(uname -r) linux-image-extra-virtual
sudo apt-get install -y docker-engine
#sudo apt-cache policy docker-engine
#sudo apt-get install -y docker-engine=1.13.1-0~ubuntu-xenial
sudo service docker start
sudo docker run --name demo hello-world
sudo groupadd docker
sudo usermod -aG docker $USER

#sudo mkdir -p /etc/systemd/system/docker.service.d
# vi/etc/systemd/system/docker.service.d/http-proxy.conf
##[Service]
##Environment="HTTP_PROXY=http://proxy.example.com:80/"
#sudo systemctl daemon-reload
#sudo systemctl restart docker