Preparation

Add Docker PGP key:

curl -fsSLhttps://download.docker.com/linux/debian/gpg | sudo apt-key add -

Configure Docker APT repository:

echo 'debhttps://download.docker.com/linux/debianstretch stable' > /etc/apt/sources.list.d/docker.list

Update APT:

apt-get update

Install Docker

If you had older versions of Docker installed, uninstall them:

apt-get remove docker docker-engine docker.io

Install Docker:

apt-get install docker-ce

Test:

docker run hello-world

After

installation, Docker service will be started, but not enabled (i.e. it

will not be started automatically after reboot). To start it:

systemctl start docker

To start Docker automatically upon reboot (do it on your own risk!):

systemctl enable docker