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Hi guys.

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Welcome to the next section.

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In the previous section we have talked about main Docker components like Docker Client, Docker host,

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Docker Server, Docker Image, Docker Container Docker Registry and Docker Repository.

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And also I have explained you differences between virtual machines and Docker containers.

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And in this section we will start some practice activities and I would like to start with explanation

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of list of commands that you are able to use in Docker.

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And there are two different blocks of commands called management commands and commands.

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Historically, before in Docker there were only commands, but as you see here on this diagram, list

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of commands is very large and as soon as the list of Docker commands became very large, Docker developers

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have decided to split those commands into management commands.

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And now there are several management commands available like container context, image network, node

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plugin and so on.

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And basically along with management commands, you are able to use additional commands.

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It means that management commands require additional commands as arguments.

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Let me now quickly go to terminal and show you those commands in practice Docker and you should get

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the list of all available commands with short descriptions.

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And if you scroll up to the beginning of this output, you will see management commands.

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Block For example, using Image Management Command, you are able to manage images using secret command.

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You are able to manage Docker secrets.

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Using volume management Command, you are able to manage volumes.

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Also below you will see list of commands.

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And those commands basically don't require additional arguments, but some of them have available options

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and you are able to supply some additional arguments as options.

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For example, there are such kind of commands as exec export images.

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With images command.

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You are able to list images that exist in your local cache with, for example, PS command.

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You are able to list containers that are currently running.

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That's the comments that you could use.

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All right.

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Next, let me explain you how you are able to get help about specific command.

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Let me clear terminal command K and here type Docker, PS, dash, dash help.

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PS is a regular command.

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It is not a management command.

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And let's press enter.

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And here in this output you will see which options you are able to use along with Docker PS Command.

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There are short versions of every option like Dash A and there are also long versions of every option

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like dash dash all.

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And if some long options have available shortcuts, then they will be listed on the same line like this

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option dash A or dash dash all.

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And with this option you are able, for example, to show all containers, including stopped containers,

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in the same way you are able to get help about management commands.

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For example, if I'll type Docker container dash, dash help and in this output you'll see list of available

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sub commands that you are able to use along with Docker container management command, like attach,

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commit, create diff and so on.

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If you want to get help about a specific command for management command, you need to type this sub

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command after management command like this docker container.

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Let's say I want to get help about wait command, wait.

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And next I'll add option, dash, dash, help.

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And here in this output you'll see basically help for this specific command that you could use along

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with this container management command.

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And you see that this wait command will block until one or more container stop, then print their exit

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codes.

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Also, let's have a look at the help.

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For example for command Docker container M dash dash help and you'll see that this sub command has basically

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some additional available options like F or dash dash force dash L or dash dash link and dash V or dash

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dash volumes.

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All right.

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That's how you are able to get help about Docker commands and Docker management commands.

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But basically some of Docker commands are redundant to Docker management commands.

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And let me talk about that in the next lecture.

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I'll see you then.

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Bye bye.