docker-ubuntu:12.04

install-docker.bash

#!/bin/bash
# Docker for Ubuntu 12.04 LTS

# Update Linux Kernel to v3.8
if [[ ! `uname -r` =~ ^3.8 ]]; then
    sudo apt-get update
    sudo apt-get install -y linux-image-generic-lts-trusty
    sudo reboot
    exit
fi

# Install wget
if ! type wget >/dev/null 2>&1; then
    sudo apt-get install -y wget
fi

# Install Docker
wget -qO- https://get.docker.com/ | sh