Script to Download Docker at single shot for ubuntu

docker_install.sh

#!/bin/bash

# Update the Repositories
sudo apt-get update

# Remove any old / unwanted / exisitng doncker installation
sudo apt-get -y remove docker docker-engine docker.io

# Remove any old Containers / Images
# sudo rm -rf /var/lib/docker

# Install necessary packages in debian/ubuntu
sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common

# Adds the Security Key File
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

# Adding repository link
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

# Update the Repositories
sudo apt-get update

# Install docker
sudo apt-get -y install docker-ce

# create docker group
#sudo groupadd docker

# Add current user to the group
sudo usermod -aG docker $USER

# After installing exit the shell and login once again for the changes to take efect,

Credits to docker documentation. Will work on any ubuntu based OS.