Installs Docker on Elementary OS 0.4 (Loki)

install-docker-elementary-loki.sh

#!/bin/bash
sudo apt-get install apt-transport-https ca-certificates -y
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
sudo rm -f /etc/apt/sources.list.d/docker.list
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -u -cs) \
   stable"
sudo apt-get update
sudo apt-get purge lxc-docker

sudo apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual
sudo apt-get install docker-engine
sudo service docker start

sudo groupadd docker
sudo usermod -aG docker $USER

# NOTE: you'll need to exit and reenter the shell before your user is actually recognised as part of the 'docker' group.

The script failed on my system ... Loki Linux 4.13.0-32-generic

I followed the installation guide on Docker and replace the "loki" lsb_release by "xenial" and everything works :

sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable"
sudo apt-get update
sudo apt-get install docker-ce