Install Docker on Ubuntu

install_docker_on_ubuntu_1404.sh

sudo apt-get install apt-transport-https ca-certificates
sudo apt-key adv \
               --keyserver hkp://ha.pool.sks-keyservers.net:80 \
               --recv-keys 58118E89F3A912897C070ADBF76221572C52609
# Ubuntu version	Repository
# Precise 12.04 (LTS)	deb https://apt.dockerproject.org/repo ubuntu-precise main
# Trusty 14.04 (LTS)	deb https://apt.dockerproject.org/repo ubuntu-trusty main
# Wily 15.10	deb https://apt.dockerproject.org/repo ubuntu-wily main
# Xenial 16.04 (LTS)	deb https://apt.dockerproject.org/repo ubuntu-xenial main
echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" | sudo tee /etc/apt/sources.list.d/docker.list
sudo apt-get update
apt-cache policy docker-engine

# Verify docker is installed
docker run hello-world