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OK guys.

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So we have just agreed to the very first container using hello world image.

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We have pulled it from a remote registry called Docker Hub and after Worlds have created container.

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And this container has printed some text to the terminal.

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Also in this text do you see suggestion to dry Amal's a container with this command dork around dash

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a deep wound to bash and with this command to we will be able to create a NAS or container using a wound

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to image but let's try it without the option that's a deep and best thrust simply as we have it dry

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it the wheels dock around.

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Hello world.

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Let's no type dork Iran will want to end it and see what will happen.

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Let me clear uptime and no control okay.

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And here let me type Docker on Iran.

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Do you see that we again we are not able to find.

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Image aboot latest locally.

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And that's why we have started pool operation from a remote registry Docker Hub and you'll see that

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we have pulled several times and you see here different ideas now.

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A real not explain what it means.

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We will get back to it later on when they will explain how Docker rocks under the hood.

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For now you should understand that we have simply pulled in which gold to bundle from a remote registry

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Docker Hub.

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Also you see SHA 256 hash.

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Same as we have seen before.

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Hello rolled image but of course hash itself is different here from the hash for Hello rolled image.

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Also you see finally that the image was the.

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Its status is downloaded but afterwards after we have executed basically Doc Iran want to command we

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have returned to terminal.

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It means that actually nothing happens and we are not able to do something inside or the wound to container.

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But it was immediately terminated afterwords.

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Why.

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Because there was no command that was executed inside of this winter container.

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And if there are no processes Iran in inside of the container Docker automatically terminates container

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and if I'll enter Docker B.S. now you'll see that there are no containers Iranian.

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But I am able to observe history of the containers that where exited.

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For that you could use command Docker B S with option dash a like so and now I'll see that there was

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a container that was based on a one to image and there was command.

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This one that was executed automatically.

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Here was this command but we have not performed anything inside of the bash inside of the container.

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That's why container has decided that best should exit and it was exited.

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Process was terminated and afterwords Docker has eggs that container as well.

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This way Here you see that the status of this container is exited about a minute ago.

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Also you see information about previous containers that we have created in the previous lecture and

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we have used their whole Hello rolled images here and here.

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We have created basically two different containers and you see that they were exited about an hour ago.

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Okay.

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That is the status of this container that we have tried to create using a docker Iran command.

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Also if I list now local images with command Docker images I should see here a wound to image on the

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list.

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That means that you failed Dwyer to create one more container using a 1 2 image.

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It will be created using the same image as you see here.

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There was no need to pull the same image from Docker Hub.

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Let's try that again and let's try it.

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That was the same comment as we have used before Docker Iran or window and we see actually nothing but

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again under the hood Docker has created new container based on this image.

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There was no need again to pull it from Docker Hub because we already have it here on the list but after

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the container was again automatically terminated.

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Let's have a look at history of containers Docker B.S. and DSP.

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Actually there was alternative commendable Docker appears and this command is docker container alas.

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And if I'll type here.

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Door cargo container unless there's a you'll see actually the same result as with Docker because Dash

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8 it brings us history of all containers that were created before.

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And again you see here one more container that was created using a boom to image.

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And this container was exited.

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I mean the goal here below you'll see a second container with the same image a window but this one was

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exited four minutes ago.

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It means that each time when you execute command dock Iran and some image Docker creates new container

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based on specific image.

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But now you may ask me a question how we are actually able to look into that container container and

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execute some commands inside of that wound the operating system.

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Answer is pretty simple.

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Let me show you Dr Ron dash idea.

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Let's press enter and see what will happen.

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And now you'll see that I hold basically anther best shell inside of that window container and I have

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locked in automatically as a route user here you see that.

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And here is actually a d of this container that was just created and now I am still inside of this container

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and container is still run.

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Let me show you that.

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It is still running.

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Let me open up new tab here in time now and let's enter Docker at B S command.

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Here you see image that was used this window and all you see here container I.D. And this I.D. is the

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same as you see here in this bash shell inside of that one two container.

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And now actually we are able to perform some operations inside of this container for example let's use

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a last command and list files inside of that one container.

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And here you see some set of folders.

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And for example you are able to list the files inside of the bin folder.

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Let's do that has been and you'll see some set of executable that you are able to use inside of that

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will want a container.

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Again please notice that this set of files and folders is completely isolated inside of this computer

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container.

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It is not a set of files on my Mac most computer where I am running Docker right now.

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Actually let me assure you that to prove that let me open up one more step and here let me Alice and

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you'll see actually at least of a folder on this Mac computer.

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And also I am able to list actually files in lesbian folder and you'll see it set of executable it's

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on my make us computer and this set of executable is of course different from this set of executable

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files.

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That's how you're able to list the files inside of the container and again again container is still

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around.

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You could verify it here.

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Docker appears and you see that there was a container with one image that is up and running and it is

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up to minutes and also you see here which command was executed being slashed.

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Bash does bash shell and we are actually located now in this best shell okay.

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Liz note is that the this container runs no full featured one two operating system and you could verify

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a of this operating system using cut the slash it is seam slash Oh yes that's release you see here Marshall

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womb to age no fraud not for long term support release also we could try something go so let's try for

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example X command let me clear terminal and type echo how low from one to container enter and you'll

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see a hello from a window container here in this shell please note that we are able to use this command

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because there is such executable inside of the bin folder let me list contents of a bin folder once

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again and you'll see here on the list let's twice Thompson girls let's call your terminal and type host

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name come in and you'll see here cos name of this container it actually matches with this a d here on

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the list also we're able to verify which IP address was assigned to this container using command hostname

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that I like so and you'll see IP address one hundred seventy two seventeen or two here in this output

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great that's how you're able to perform some inside of that one to container let's not type exit and

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let's exit from this bash shall exit and we have it back to our time no less.

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Now least the containers that are currently running Docker B.S. and you'll see empty output basically

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you are able to use alternative command to look up yes docker container alas and you'll see same result

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there were no containers currently running but if I'll enter Docker B S dash a you'll see that our winter

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container was exited 34 seconds ago why it was exited answer was pretty simple.

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We have exited from bash shell inside of the container and that terminate that bash brought us inside

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of the container and when there are no processes running inside of the container Docker simply terminates

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such a container and that's what actually happened here.

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In this example.

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Great.

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Let's also clear terminal and let's have a look at the size of the image.

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That was the loaded 4 1 2 containers Docker images like so.

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And here you'll see size equal to 64 megabytes.

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There's of course much more large art than science of the hello world container that was simply less

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than 2 kilobytes in size but this size is relatively small in comparison to let's say Docker installation

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itself.

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That was around 2 gigabytes for Mac OS or Windows computer.

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But this size is still large in the docker world because we have used here full featured wound to operating

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system and in the next example I would like to demonstrate you how you're able to create the Linux container

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using the smallest image possible.

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Let's try that next.

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My.