Install Docker¶

Docker is an open-source platform for building, shipping, and running applications in isolated containers. It packages code and all dependencies together so the application runs consistently across environments.

Ubuntu and its derivatives only

This script targets Ubuntu-based systems (Debian family). It is not supported on RHEL, Fedora, Alpine, or macOS.

Not for production use

This installer is designed for local development, lab clusters, and CI environments. For production, follow the official Docker hardening guide.

What Gets Installed¶

Component	Purpose
`docker-ce`	Docker Engine (daemon + CLI)
`docker-ce-cli`	Docker CLI
`containerd.io`	Low-level container runtime
`docker-buildx-plugin`	Multi-platform image build support
`docker-compose-plugin`	`docker compose` subcommand

Prerequisites¶

Ubuntu or an Ubuntu-based OS
curl available
Run as root or with sudo

Install¶

curl -fsSL https://raw.githubusercontent.com/ibtisam-iq/silver-stack/main/scripts/installers/install-docker.sh | sudo bash

Idempotent — safe to re-run

If Docker is already installed, the script detects it, validates the daemon state, repairs it if inactive, and exits without reinstalling.

What the Script Does¶

Runs preflight checks (OS, connectivity, root access)
Installs ca-certificates and curl as prerequisites
Adds the official Docker APT repository and GPG key
Installs all five Docker components in one apt-get install
Enables and starts the Docker daemon via systemctl
Adds the invoking user to the docker group

Post-Install¶

Apply the docker group to the current shell session without logging out:

newgrp docker

Verify the installation:

docker version
docker compose version

Optional: Set up a short alias with tab completion

Add these lines to ~/.bashrc to use d as a shorthand for docker:

alias d='docker'
if declare -f __start_docker > /dev/null 2>&1; then
    complete -F __start_docker d
fi

Reload the shell to apply:

source ~/.bashrc