The Docker flow: Images to containers

- [Instructor] Now that we've got Docker installed…and talked a little bit about what Docker is,…let's talk about what Docker does.…The Docker flow the fundamental concept,…in Docker it all begins with an image.…An image is every file that makes up just enough…of the operating system to do what you need to do.…Traditionally you'd install a whole operating system…with everything for each application you do.…With Docker you pair it way down so that…you have a little container with just enough…of the operating system to do what you need to do,…and you can have lots and lots of these efficiently…on a computer.…

Let's take a look at that.…So let's take a look at Docker images.…Amazingly creatively, the command to look into…your Docker images is Docker images.…It's a little bit squished, let me stretch that out…for us, there we go.…So here we have where the image came from, the repository,…a tag is a version number.…The repository for the image is where it came from.…

In this case it was named ubuntu,…this is the example we use in the installation movies.…