Docker installation

Prerequisites

sudo apt update
sudo apt install \
ca-certificates \
curl \
gnupg \
lsb-release

Add official Docker’s GPG key

sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

Install Docker engine

sudo apt update --allow-insecure-repositories
sudo apt --allow-unauthenticated install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Receiving a GPG error when running ‘apt update‘?

Your default umask may not be set correctly, causing the public key file for the repo to not be detected. Run the following command and then try to update your repo again: ‘sudo chmod a+r /etc/apt/keyrings/docker.gpg‘.

Run ‘docker‘ without ‘sudo‘

sudo groupadd docker
sudo usermod -a -G docker $USER
groups
grep docker /etc/group
newgrp docker

Validate installation

sudo docker run hello-world