docker-install.sh

#!/bin/sh
# Install Docker on debian 9.1
#
# (c) 2017 by Klaus Kappel <kkappel@jugendhilfe-wuemmetal.de>
# No Warranty at all
# Best Parctice: take a brand new debian-netinstall out of the box
# be sure, that network is already running

if [ "$EUID" -ne 0 ]
  then echo "Please run as root"
  exit
fi
# Check if there ist any old docker installation
apt-get remove docker docker-engine docker.io

apt-get update
apt-get install \
     apt-transport-https \
     ca-certificates \
     curl \
     gnupg2 \
     software-properties-common
     
curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg | apt-key add -

apt-key fingerprint 0EBFCD88
read

add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
   $(lsb_release -cs) \
   stable"
   
apt update
apt-get install docker-ce