Installation

Install Docker

Step-by-step installation guides for Windows, Linux, and macOS.

Ubuntu/Debian Installation

Install Docker Engine on Ubuntu-based systems

Update packages

sudo apt-get update

Install dependencies

sudo apt-get install ca-certificates curl gnupg lsb-release

Add Docker GPG key

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

Add Docker repo

echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Install Docker

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

Add user to docker group

sudo usermod -aG docker $USER

Enable Docker

sudo systemctl enable --now docker

Post-Installation Configuration

Configure Docker daemon and verify installation

# Post-installation steps for Linux

# Start Docker service
sudo systemctl start docker
sudo systemctl enable docker

# Add your user to docker group (logout/login required)
sudo usermod -aG docker $USER

# Verify Docker works without sudo
docker run hello-world

# Configure Docker daemon (optional)
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<EOF
{
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
  },
  "storage-driver": "overlay2",
  "live-restore": true
}
EOF

sudo systemctl restart docker

Installation Checklist

Docker daemon running

Docker client installed

User in docker group

docker run hello-world succeeds

Docker Compose available

Daemon configured correctly