Docker

Introduction

In this document, you will learn to install the latest and official Docker on your server.

Installation

Uninstall old versions

Important

There are many unofficial packages, including:

docker.io
docker-compose
docker-compose-v2
docker-doc
podman-docker

Run this command to uninstall older pacakges:

for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done

Install using the apt repository

Set up Docker repository, copy and run this hole command:

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update

Install Docker packages

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Start docker and test

This command downloads a test image and runs it in a container. When the container runs, it prints a confirmation message and exits.

sudo service docker start
sudo docker run hello-world

Installation completed!

You have installed and started Docker successfully.