docker installation on Ubuntu 14.04 LS

Docker_for_Ubuntu14.sh

#!/bin/bash
#Installation Instructions for Ubuntu

#The simplest way to get docker, other than using the pre-built application image, is to go with a 64-bit Ubuntu 14.04 VPS

#Update your droplet:
sudo apt-get update
sudo apt-get -y upgrade

#Make sure aufs support is available:
sudo apt-get install linux-image-extra-`uname -r`

#Add docker repository key to apt-key for package verification:
sudo apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

#Add the docker repository to Apt sources:
echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" | sudo tee /etc/apt/sources.list.d/docker.list

#Update the repository with the new addition:
sudo apt-get update

#Finally, download and install docker:
sudo apt-get install docker-engine

#Ubuntu's default firewall (UFW: Uncomplicated Firewall) denies all forwarding traffic by default, which is needed by docker.
#Enable forwarding with UFW:
#Edit UFW configuration using the nano text editor.

sudo nano /etc/default/ufw
#Scroll down and find the line beginning with DEFAULTFORWARDPOLICY.
#Replace:

DEFAULT_FORWARD_POLICY="DROP"
#With:

DEFAULT_FORWARD_POLICY="ACCEPT"
#Press CTRL+X and approve with Y to save and close.

#Finally, reload the UFW:

sudo ufw reload
#For a full set of instructions, check out docker documentation for installation.