*always smart first

sudo apt-get update && sudo apt-get upgrade

if you trust them

curl -sSL https://get.docker.com | sh

if you want to look at the script first

curl -fsSL https://get.docker.com -o get-docker.sh sudo sh get-docker.sh sudo usermod -aG docker pi

• may need to start or enable the daemon as well

sudo systemctl enable docker