Docker Tutorial - Getting Started

📅 2026-06-12 | 📂 Docker

Introduction

Docker is a platform for developing, shipping, and running applications in containers. Containers package an application with all its dependencies, ensuring consistent behavior across different environments.

Installing Docker

# Ubuntu/Debian
sudo apt update
sudo apt install docker.io
sudo systemctl start docker
sudo systemctl enable docker

# Add user to docker group (avoid sudo)
sudo usermod -aG docker $USER

Basic Commands

# Check Docker version
docker --version

# Pull an image
docker pull nginx

# Run a container
docker run -d -p 80:80 --name mynginx nginx

# List running containers
docker ps

# Stop and remove
docker stop mynginx
docker rm mynginx

Your First Container

# Run a simple web server
docker run -d -p 3000:80 --name website httpd

# Check it works
curl http://localhost:3000

# View logs
docker logs website

Summary

Docker simplifies application deployment by packaging everything into portable containers. Start with basic commands like run, ps, stop, and rm to manage your containers.

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