Install docker on ubuntu 14.04

docker-install.sh

sudo apt-get update && \
sudo apt-get install apt-transport-https ca-certificates && \
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D && \
sudo touch /etc/apt/sources.list.d/docker.list && \
echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" | sudo tee -a /etc/apt/sources.list.d/docker.list && \
sudo apt-get update && \
sudo apt-get purge lxc-docker && \
sudo apt-cache policy docker-engine && \
echo "--------------------------" && \
echo "Installing docker" && \
sudo apt-get install -y linux-image-extra-$(uname -r) docker-engine