Ubuntu Docker Quickstart

# Remove old versions
sudo apt remove docker docker-engine docker.io containerd runc

# Install dependencies
sudo apt update
sudo apt install -y ca-certificates curl gnupg lsb-release

# Add Docker's GPG key
sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

# Add repository
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.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 update
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# Add user to docker group
sudo usermod -aG docker $USER
newgrp docker

# Check Docker version
docker --version
docker compose version

# Run hello world
docker run hello-world

# List containers
docker ps -a

# List images
docker images

# Remove unused containers
docker container prune

# Remove unused images
docker image prune

# System cleanup
docker system prune -a

# docker-compose.yml
version: "3.8"
services:
  web:
    image: nginx:alpine
    ports:
      - "80:80"
    volumes:
      - ./html:/usr/share/nginx/html

  db:
    image: postgres:15
    environment:
      POSTGRES_DB: myapp
      POSTGRES_USER: user
      POSTGRES_PASSWORD: password
    volumes:
      - postgres_data:/var/lib/postgresql/data

volumes:
  postgres_data:

alias d="docker"
alias dc="docker compose"
alias dps="docker ps"
alias dpa="docker ps -a"
alias di="docker images"
alias dr="docker run"
alias de="docker exec -it"
alias dlog="docker logs"
alias dstop="docker stop"
alias dstart="docker start"
alias drm="docker rm"
alias drmi="docker rmi"

# Start services
docker compose up -d

# View logs
docker compose logs -f

# Stop services
docker compose down

# Rebuild and start
docker compose up --build -d