These are the minimum steps needed to setup docker on a RPi running Ubuntu Server. I am using an Ubuntu Server 20.04 (arm64) version (see previous post about how to set it up)
– Clean-up (optional)
sudo apt-get remove docker docker.io containerd runc
– Install dependencies
sudo apt install -y apt-transport-https gnupg-agent
– Add Docker PGP certificate
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
– Add repository
sudo add-apt-repository \
"deb [arch=arm64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable"
– Install Docker
sudo apt update && sudo apt install docker-ce docker-ce-cli containerd.io
– Add `ubuntu` user to `docker` group (you need to re-login to take effect)
sudo usermod -aG docker ubuntu
– Optionally verify everything works
docker run --name hello hello-world
docker rm hello
docker rmi hello-world
And that’s all that is needed.