In this 10-minute tutorial, see how Docker works first-hand:
You'll search for and find an image another user built and shared in the Docker Hub Registry, a cloud-based collection of applications.
You'll download and run it - running images are containers - and have it output 'hello world'.
Then you'll install the 'ping' utility into the container, commit all your changes, and run a test of your updated image.
Finally, you'll push your image to the Docker Hub Registry so that other developers can find and use it...
...on a laptop, a VM in a data center, or a public cloud instance, without having to change anything at all about the image!
This emulator provides only a limited set of shell and Docker commands.