What is Docker?

Docker is a containerization platform that allows you to package applications and their dependencies into containers.

Key Concepts

• Image: A blueprint/template for a container.
• Container: A running instance of an image.
• Dockerfile: A script to create images.
• Docker Compose: A tool for managing multi-container applications.
• Volume: A way to persist data in containers.

Run Your First Container

Try running a simple hello-world container:

docker run hello-world

It should output a welcome message.

Step 3: Learn Docker Commands

1. List running containers:

   docker ps
   

2. List all containers (including stopped ones):

   docker ps -a
   

3. Stop a container:

   docker stop <container_id>
   

4. Remove a container:

   docker rm <container_id>
   

5. List all images:

   docker images
   

6. Remove an image:

   docker rmi <image_id>