Install latest stable Docker daemon to an Ubuntu instance

install_docker_ubuntu.sh

#!/bin/bash

# Also seen here:
# https://docs.docker.com/install/linux/docker-ce/ubuntu/
# https://docs.docker.com/install/linux/linux-postinstall/

sudo apt-get update

sudo apt-get -y install \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

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

sudo apt-get update

sudo apt-get -y install docker-ce

# Using the user you want to execute docker commands without using sudo
sudo usermod -aG docker $USER