====== Docker Installation =====

Install Docker on Ubuntu or Debian for containerized applications.

> //Docker provides a platform for developing, shipping, and running applications in containers.//

===== Overview =====

Docker installation on Ubuntu/Debian can be done through the distribution's repository or Docker's official repository. The official repository provides the latest version.

===== Option 1: Using Distro Repository (Quickest) =====

```bash
sudo apt update
sudo apt install -y docker.io ca-certificates curl
sudo systemctl enable --now docker
```

This method is quick but may not have the latest Docker version.

===== Option 2: Using Docker Official Repository (Latest) =====

```bash
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/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] 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 update
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
sudo systemctl enable --now docker
```

For Ubuntu, replace `/linux/debian` with `/linux/ubuntu` in the URLs.

===== Verify Installation =====

```bash
sudo docker run hello-world
```

If successful, you'll see a welcome message from Docker.

===== Run Docker Without Sudo =====

```bash
sudo usermod -aG docker $USER
newgrp docker
docker run hello-world
```

This allows you to run Docker commands without sudo.

===== References =====

  * [[https://docs.docker.com/engine/install/ubuntu/|Install Docker Engine on Ubuntu]]
  * [[https://docs.docker.com/engine/install/debian/|Install Docker Engine on Debian]]
  * [[https://readthemanual.co.uk/install-docker-debian-ubuntu/|Install Docker on Debian 12 and Ubuntu 22.04 LTS (2026)]]
  * [[https://linuxize.com/post/how-to-install-docker-on-ubuntu-26-04/|How to Install Docker on Ubuntu 26.04]]

===== See Also =====

  * [[hosting:docker:start|Docker Overview]]
  * [[hosting:docker:concepts|Basic Docker Concepts]]

Last updated: 2026-06-19
  * [[hosting:start|Return to hosting]]