Single Line Install

curl -sSL https://get.docker.com | sh

Manual Install

• sudo apt update - Update package list
• sudo apt install apt-transport-https ca-certificates curl software-properties-common - Install prerequisite software
• curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - - Add the GPG key for the official Docker repository
• sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable" - Add the Docker repository to APT sources
• sudo apt update - Again, update the package list
• apt-cache policy docker-ce - Ensure we're installing from the Docker repo, rather than Debian
• sudo apt install docker-ce - Install Docker
• Make docker run automatically on boot: sudo systemctl enable --now docker

Finally, you can ensure Docker is up and running with: sudo systemctl status docker. It should now be possible to use the docker command as normal

---

Set Permissions

Ideally, you should run containers without root privileges.

• sudo groupadd docker- Create a Docker user group (likely already exists)
• sudo usermod -aG docker $USER - Add current user to the docker group
• newgrp docker - Update group ID for current user

---

Optional Docker Utilities

If needed, install:

LazyDocker github.com/jesseduffield/lazydocker

Terminal interface for managing docker containers and services

• go get github.com/jesseduffield/lazydocker (requires Go to be installed)

Dozzle github.com/amir20/dozzle

Realtime log viewer for docker containers

• docker run --name dozzle -d --volume=/var/run/docker.sock:/var/run/docker.sock -p 8093:8080 amir20/dozzle:latest

dockly github.com/lirantal/dockly

Node app for managing Docker from the command line, similar to LazyDocker

• npm install -g dockly (requires Node.js's npm installed)

Portainer github.com/portainer/portainer

Fully featured web application for managing everything Docker

• docker volume create portainer_data
• docker run -d -p 8000:8000 -p 9000:9000 --name=portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce

cAdvisor github.com/google/cadvisor

Analyzes resource usage and performance characteristics of running containers, has built in Prometheus exporter

• docker run --volume=/:/rootfs:ro --volume=/var/run:/var/run:ro --volume=/sys:/sys:ro --volume=/var/lib/docker/:/var/lib/docker:ro --volume=/dev/disk/:/dev/disk:ro --publish=9000:8080 --detach=true --name=cadvisor --privileged --device=/dev/kmsg gcr.io/cadvisor/cadvisor:$VERSION

Watchtower github.com/containrrr/watchtower

Automatic updates of Docker base images

• docker run -d --name watchtower -v /var/run/docker.sock:/var/run/docker.sock containrrr/watchtower

I typically use LazyDocker, cAdvisor and sometimes Portainer or Dozzle.