Introduction to Docker

Docker is a popular containerization platform that allows developers to package, ship, and run applications in containers. Containers are lightweight and portable, making it easy to deploy applications across different environments.

Step 1: Install Docker

To get started with Docker, you need to install it on your machine. You can download the Docker Desktop application from the official Docker website.

# Install Docker on Ubuntu-based systems
sudo apt update
sudo apt install docker.io -y

Step 2: Pull a Docker Image

Once Docker is installed, you can pull a Docker image from the Docker Hub registry. For this example, we will use the official Ubuntu image.

# Pull the Ubuntu image
docker pull ubuntu

Step 3: Run a Docker Container

After pulling the image, you can run a Docker container using the docker run command.

# Run a Docker container from the Ubuntu image
docker run -it ubuntu /bin/bash

Step 4: Verify the Container

Once the container is running, you can verify that it is working by checking the container's IP address and browsing to it.

# List all running containers
docker ps

Conclusion

In this tutorial, you learned the basics of Docker and how to containerize your first application. You installed Docker, pulled a Docker image, ran a Docker container, and verified that it is working.