Run Your First Container

Now that you have Docker installed, let’s run something! The “Hello World” of Docker is a simple image that prints a message to your terminal. 🐳

Open your terminal and run this command:

docker run hello-world

When you ran that command, Docker did four things:

Check: It looked on your computer for an image called hello-world.
Download: Since it was your first time, it didn’t find it. So, it automatically went to the internet (Docker Hub) and downloaded it.
Create: It created a new container from that image.
Run: It ran the container, which printed a “Hello from Docker!” message to your screen.

To see a list of containers that are currently running on your machine, use:

docker ps

To see ALL containers (even the ones that have finished running), use:

docker ps -a

You don’t need to manually download things. Just use docker run, and Docker handles the rest for you! ⚡