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[Intro Music]

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You know now what is Docker Image,

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and what is Docker Container, and

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you are able to create multiple

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containers from the same Docker

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Image. And difference between Docker

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Image and Docker Container, is that

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you are not able to modify Docker

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Image, you are able only to read it

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or create other image on top of that

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image. Also, when you create

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container, Docker creates writable

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layer and you are able to modify or

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create new files inside of the

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running container. And I have just

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shown you that you are able to

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launch multiple containers based on

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the same image. Now let me explain

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you what is Docker Repository.

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Probably, you know what is Git

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repository. If you don't know

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please check out my large course

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called 'Complete Git and GitHub

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guide' where I explain all the

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details of Git and GitHub. But in

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short words Git Repository is

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simply a set of files, and you are

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able using Git to track changes in

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repository. You're also able to

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publish your Git Repository to

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hosting service like GitHub, for

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example, or Bitbucket; and that is

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Git Repository. What is Docker

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Repository? You are able to create

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Docker Repository from Docker

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Images. And in every Docker

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Repository, you can have different

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versions of Docker Image. And you

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are able to create different

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versions of a specific Docker Image

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using tags. By default, every

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Docker Image should have at least a

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single tag called 'latest', but you

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are able to assign different tags

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to different versions of Docker

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Images. And this set of Docker

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Images with different tags is

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called Docker Repository. That's

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it. For example, if I go to list of

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images here on this computer, let

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me exit from this 'busybox' container;

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and enter 'docker images' command.

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I'll see such containers, for

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example, as 'wordpress', and you'll

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see two such kind of containers

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with two different tags, '5.4',

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and 'latest'. And that means

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that actually those two different

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images belong to same repository,

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but they were downloaded from

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Docker Hub. That is actually a

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repository hosting service called

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Docker Registry, and let's discuss

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what is Docker Registry in the next

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lecture. I'll see you just in a

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moment. Bye-Bye.

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[no audio]