# Install Docker Engine on Ubuntu

[TOC]

## Uninstall old versions

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

### Add Docker's official GPG key

sudo apt update && sudo apt install -y \
  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

## Install the Docker packages

sudo groupadd \
  -g `id -g $USER` \
  -o \
  docker

### Install the latest version

sudo apt-get install \
sudo apt update && sudo apt install -y \
  docker-ce \
  docker-ce-cli \
  containerd.io \
  docker-buildx-plugin \
  docker-compose-plugin

## Manage Docker as a non-root user

### Add user to the `docker` group

sudo usermod -aG docker $USER

### Activate the changes to groups

newgrp docker

:::success
Or just log out and log back in.
:::

### Verify that docker can be runned without sudo

docker version

Client:
 Version:           26.1.3
 API version:       1.45
 Go version:        go1.22.2
 Git commit:        26.1.3-0ubuntu1~24.04.1
 Built:             Mon Oct 14 14:29:26 2024
 OS/Arch:           linux/arm64
 Context:           default

Server:
 Engine:
  Version:          26.1.3
  API version:      1.45 (minimum version 1.24)
  Go version:       go1.22.2
  Git commit:       26.1.3-0ubuntu1~24.04.1
  Built:            Mon Oct 14 14:29:26 2024
  OS/Arch:          linux/arm64
  Experimental:     false
 containerd:
  Version:          1.7.24
  GitCommit:        
 runc:
  Version:          1.1.12-0ubuntu3.1
  GitCommit:        
 docker-init:
  Version:          0.19.0
  GitCommit:

## Configure Docker to start on boot with systemd

:::info
On Ubuntu, the Docker daemon starts on boot by default.
:::