First time in my life watching something related to Docker. Understood everything. Put it into practice on my own project. Absolutely outstanding tutorial. Best there is by light years!

Wow, I can't believe it! I learned Docker in one hour. You are amazing!

I am speecheless...I knew nothing about Docker an hour ago and here am I already creating my own images and running them inside containers. What a tutorial!!!!!!!! Thanks a ton Nana. I had to hit that Subscribe button! 🙏🔥

I have watched around 5-7 "beginner" tutorials on Docker, but none came even close to the comprehensiveness of this tutorial. This tutorial clarifies thoroughly the fundamentals of Docker at a perfect pace! Forever in your debt! :D

This is the best crash course I have seen on Docker. In 1 hour I was able to fully understand the basics that I have struggled with for a while. Thanks Nana!

I'm a long time follower of your channel, and love the way you teach. There are a lot of very talented instructors here on UKposts, and I appreciate every one of them. What sets you apart from the rest is that you explain even the little details that everyone else glosses over, for example, " -it means interactive terminal " . That one little detail made learning k8s so much easier! Please keep up the great work!

Your explanations and animation graphics make learning so much fun. Thanks for doing so much for the community 👏🏻🙏🏻

A great introductory course. Simple and concise. Slight correction for the Dockerfile section of the video. - *The commands in a dockerfile are not RUN/MAPPED in the container, only while BUILDING the image.* - _If it were, spinning up new containers would take longer as dependencies would have to be installed for each new container._ - Building a Docker image creates an object (the final layer) which specifies folder structures and contains all the necessary files i.e. base image files, installed package files, your program code and all other artifacts created as a result of the instructions in your Dockerfile. - Running the image creates a process (the container) to manage an ISOLATED instance with a folder structure and content continuing from where the image ended i.e. "run your code". This is why 2 containers based on the exact same image may have different contents at run time depending on what your code is doing to the file system: docker exec [ContainerId] ls . These underpin why a basic knowlege of Linux (file system and commands) is usually advised before learning Docker.

Definitely the best resource available to the field

Hi! I have been working towards my A+, and plan to go for CCNA after that. In the mean time as part of a homelab I wanted to create some minecraft servers using docker. I was quite overwhelmed, but your video is amazing! You explain each part and not just "show me how". I look forward to watching other videos of yours. Just want to say TYSM!!

You are by far the easiest follow on UKposts. You are clear, efficient and energetic. Thank you for not being a dud 😊.

An outstanding tutorial. All the main important moments are clearly explained and shown in practice in just an hour - a really great work! 10/10 👍 Definitely the best Docker introduction I've seen so far.

The best Docker Crash course I have seen till date , thoroughly enjoyed it. I have more than a decade experience in IT and I can safely say your way of teaching inspires me. Keep it up Nana, keep uploading more tech videos like this !! :)

Honestly this is the best and most up to date Docker crash course. It def gave me everything I needed for an upcoming project. It de-mystified all the jargon and everything is explained step by step in a good progression. I'll be checking out your online courses! Thank you so much for providing this!

This is one of the best docker beginner tutorial. Amazing easy to understand tutorial with simple explanations with animations and live demo. Thanks Nana

Thanks for all the effort you've put on this video, Nana. It's super well made and helpful!

this course is gold! been postponing learning how to use docker and you made it simple to learn and how it works behind the scenes. Thanks for doing this!

This was such a great course. It gave me everything I needed to no feel overwhelmed when getting started using docker. Thank you so much for making this free, it looked like it took a lot of effort to put it together as it is present so well.

The way you teach is beyond words. Thank you for touching the topic from the basic and covering all the aspects along!!

This is so much better than any of the other Docker videos I tried. This is the minimum amount of info needed, love it! Any tutorial with less information is leaving out something essential.

Nana your courses are so awesome. I really appreciate your pacing and in-depth explanation. I've not had the opportunity to work much with containers professionally, and your tutorials are really helping me out as I implement them first in my home lab, and later at my job. Your hard work is appreciated!

This is an incredible video, an exemplar display of both technical and pedagogical competence. The animations are on point too, and combined with your way of exposing the whole learning process becomes so lightweight and pleasurable. Thank you for real 💎

Been in industry for 2 decades. These 1 and 4 hours courses are a boon for a large segment of population. Thanks a lot !

Enough information to be able to have a sensible discussion with IT. The most helpful tutorial I've ever used!

That was awesome! Thank you for taking out time and creating this gem. I always struggled with Docker, but this video is super easy and you explained everything perfectly. Thank you Nana.

The best video I have got on youtube for docker.

Thank you ALOT! i needed this. for the past 3 years i have postponed learning docker because i thought it was difficult. You explain it very well !

This is the best tutorial I could find so far that well answer the WHYs and WHATs questions in my head. Clear explanation and visualization. Many thanks!!

One of the best courses with very clear explanation and animation. Appreciate it.

Simply the best channel for learning CN tools.

You're the first person I found that managed to explain what a container actually is and what it does in a way that's clear.

This tutorial is just awesome! I was struggling to build the whole Docker picture in my head, but this video just rock it! Thank you!

This is EXACTLY what I needed. Clear, with perfect balance between theory and practice. Thank you so much!

I have been out of the development world for about a decade. This video was SUPER helpful in updating my brain to the current day about application virtualization. THANK YOU so much for creating this excellent presentation.

WOW Nicely done! I looked several tutorials and docs and this is the first time I really understand the difference between docker containers and VMs! You are a great teacher

The absolute finest introduction to Docker on UKposts, period. Thank you kindly for sharing your knowledge.

I have never done or used docker in the past, but, I have been wanting to learn. Now I am motivated to go deeper into this subject. Great Job!!!!

Absolutely Amazing crash course and love the way you've gone in to detail but just enough to get the flow moving and to cover such a huge topic in one hour. Thank you. Sadly, one key are many doing such tutorials seem to skim over is the concept of how the tool/application applies to the real world/SD lifecycle. This was attempted at 1.03 in the video but again, skimmed over I presume to keep the video to 1 hour however, I hope @Nana can take this feedback onboard and spend that last 10 minutes really showing how the tool/application is utilised in real world DEVOPS environments with examples. Aside from this, the key concepts within such a short video are clearly explained and a huge thank you once again for the hard work! Mo

What a great video, what a great tutorial. Congratulations. I've spent time trying to understand the fundamentals of Docker on other YT channels, but none of them explains that well. Thank you so much. I've subscribed and will work on your other videos!

Best 1 hour course yet. Thank Nana.

What an explanation. Just amazing. I have an interview tomorrow, and this one-hour video cleared all my doubts. Thank you so much for this.

You are one of my favorite humans ever!

Brilliant job of explaining this. The examples were realistic, the graphics were clear and helpful, and the pace was just right. Thank you!

Great video! I love how you break everything down so well. I have only watched a few minutes but I am already getting things I kind of understood but not fully.

Explanations are clear and easy to understand. I tried many times to learn Docker concepts but I succeeded this time. Thanks for the great explanations

Nana is always on point

I'm taking a DevSecOps class that touched on Docker, but I'm 13 minutes into this video and it's already clarifying some holes in my understanding. Thanks so much... I'm really looking forward to checking out your other videos.

Thank you for making this video. I've been waking up very early every morning to take your classes and have improved my skills. Knowledge is worth more than gold so you have done a great service. Also, I call my grandmother Nana and she is the coolest lady in the world.

Very well explained - you have a great ability to convey information in plain, easy to understand terms. I didn't understand Docker before watching this but you totally demystified if for me! Thanks - Subscribed!

It helped a lot for beginners like me. The way you teach and explain through animations makes it understandable for all. Stay blessed ever ameen

Thank you Nana for this great intro tutorial. I am a complete newbie to Docker and after watching your video I think I understand docker pretty well. Thank you once again!

The animation is presented with great content

This video should be the definition of crash course is.

As always, the best explanation. Thank you for making such a wonderful crash course.

I've recently been learning more about Docker by taking courses and reading documentation, and honestly this whole video has been so helpful. Thank you!

You are a great teacher; thank you very much for making this video. It was the best hour I’ve ever spent learning something in my life. Every concept was extremely clear and is now firmly embedded in my mind.

I can tell how much work was put into creating this video. The information and presentation are both of very high quality. Will be subscribing for more :)

Awesome, you make tech so simple. Thank You so much

Hands-down, one of the best explanation of Docker ever. God bless you!

This is the best docker crash course I've seen so far, I was struggling with all the other videos and with yours I have 0 questions, I loved the part where you created the Dockerfile, you created in a way that it was super clear why you were using some specific commands, you got a new subscriber :)

That was awesome explanation . Thanks a lot Nana. No other crash course matches with this 👏👏👌👌

Great job a always Nana and Nicole

Amazing introduction to Docker, it was super clear and concise, thank you so much Nana ! 👏😎 Going to the 3 hours full course RN

Your videos have been extremely helpful and informative. Appreciate for the effort and dedication you put into creating them. Thank you so much! 👏👏🙏

Thank you Nana - very helpful informative!

First to comment. Thanks for everything you do for the community ❤

I am a curious learner and a novice in Docker. This tutorial is so amazing. it made me confident about Dockers right away!. Thx a Ton !!

I really loved the tutorial. Completed on a single sitting. Really great tutorial. Keep up the good work.

Here are all of the commands - plus a few more I read about online: docker commands --------------- Here are some commonly used Docker CLI commands: docker ps Lists all running Docker containers. If you want to see all containers (not just running), use `docker ps -a` docker pull [image name]:[tag] Downloads a Docker image from Docker Hub docker images Lists all Docker images that you have locally docker run [image name]:[tag] run a Docker container from a Docker image. You can specify the image either by its name or ID. DETACH docker run -d [image name]:[tag] runs in detached mode, eg, doesn't hijack your terminal run will pull the image from docker hub if it isn't found locally PORT BINDING docker run -d -p [local port]:[container port] [image name]:[tag] NAME THE CONTAINER docker run --name [given name] -d -p [local port]:[container port] [image name]:[tag] docker logs [container name | container id] Fetches the logs of a container. You can specify the container either by its name or ID. docker stop [container name | container id] Stops a running Docker container. You can specify the container either by its name or ID. docker start [container name | container id] starts an existing container docker rm [container name | container id] Deletes a Docker container. You can specify the container either by its name or ID. docker rmi [container name | container id] Removes a Docker image. You can specify the image either by its name or ID. docker images -------- DOCKER FILE the file from which an image is built -------- FROM Sets the base image for subsequent instructions. A valid Dockerfile must start with a `FROM` instruction. Example: `FROM ubuntu:18.04` COPY Copies files or directories from `` and adds them to the filesystem of the container at the path `` Example: `COPY . /app/` the trailing slask `/` means create this folder if it doesn't exist Example: `COPY package.json /app/` Example: `COPY src /app/` WORKDIR Sets the working directory for any `RUN`, `CMD`, `ENTRYPOINT`, `COPY` and `ADD` instructions that follow it in the Dockerfile. Example: `WORKDIR /app` RUN Executes any commands in a shell/terminal inside the container environment The commands add a new layer on top of the current image and commit the results. The resulting committed image will be used for the next step in the Dockerfile. Example: `RUN npm install` Example: `RUN apt-get update && apt-get install -y python3` CMD Provides defaults for an executing container. These can include an executable, or they can omit the executable, in which case you must specify an `ENTRYPOINT` command. Example: `CMD ["executable","param1","param2"]` Example: `CMD ["node","server.js"]` --- other commands --- ENTRYPOINT This command allows you to configure a container that will run as an executable. Example: `ENTRYPOINT ["executable", "param1", "param2"]` ADD This command copies new files, directories or remote file URLs from `` and adds them to the filesystem of the container at the path ``. `ADD` has some features (like local-only tar extraction and remote URL support) not present in `COPY`. Example: `ADD . /app` EXPOSE This command informs Docker that the container listens on the specified network ports at runtime. Example: `EXPOSE 8080` ENV This command sets the environment variable `` to the value ``. This value will be in the environment for all subsequent instructions in the build stage and can be replaced inline in many as well. Example: `ENV MY_NAME="John Doe"` VOLUME This command creates a mount point with the specified name and marks it as holding externally mounted volumes from native host or other containers. Example: `VOLUME /myvol` ARG This command defines a variable that users can pass at build-time to the builder with the `docker build` command. Example: `ARG VERSION=latest` USER This command sets the user name (or UID) and optionally the user group (or GID) to use when running the image and for any `RUN`, `CMD` and `ENTRYPOINT` instructions that follow it in the Dockerfile. Example: `USER myuser` Remember, the order of commands in a Dockerfile matters because each command in a Dockerfile results in a new image layer. Later commands can use the results of previous commands. Also, Docker uses a build cache - if a particular command has been executed before and nothing has changed, Docker uses the cached result, which can make building images faster. -------- Build a DOCKER IMAGE from a DOCKER FILE -------- docker build -t [name:tag] Builds a Docker image from a Dockerfile in the current directory. The `-t` option lets you specify a name and tag for the image. docker exec -it [container_id] command Runs a command in a running container. The `-it` options make the session interactive so you can interact with the command. You can specify the container either by its name or ID. docker-compose up Starts all services defined in a `docker-compose.yml` file docker-compose down Stops and removes all services defined in a `docker-compose.yml` file. -------- Remember that to use any of these commands, you first need to have Docker running on your system. Additionally, most of these commands require root privileges, so depending on your system's configuration, you might need to prefix them with `sudo`. Also note that many commands have additional options and flags that can be used to modify their behavior. You can see these by typing the command followed by `--help`, for example, `docker run --help`.

Thank you so much! This has been the best tutorial I've ever experienced. Your explanations were perfect, and you kept me engaged the entire time.

Thank you so much for your charitable contributions Nana. The growing count of Subscribers you have speaks volumes as to the appreciation your audience has for you.

Finally a tutorial that helps you understand what Docker actually is, how it works and also very practical. Although I couldn't get it to work with npm it was a step in the right direction for me. Maybe once an example in a tutorial would be possible, where a MySQL database is pulled as an image from docker-hub, then via Dockerfile a database and a table are created and lastly a record is written to the database. That would be great. But it would also be important for me to understand how I can get back to this data set, even if the container was stopped once ... (If I have understood it correctly, the container is reset with every stop, right?)

Only tutorial i've ever watched. ive tried watching over like 10 this one had me hooked from the start. easy explanation- anyone doubting keep watching i learned a lot

Keep doing what you're doing. You're the best resource on youtube for this stuff, Nana.

Brilliant Hardwork for us ...No more words to say such course Nana.. complete Docker course learned in just 2 days over weekend ...Thank you 🎉❤

Just one hour to gather all the knowledge I hardly built in many months! Congratulations.

First, I watched your full course [3 hours] about docker. I. have learned so much things but I had some question marks in my mind especially about reasons. You explained docker more clearly and more convenient way in this video. My questions have been destroyed. Many thanks!

First ever UKposts tutorial I started and finished. Amazing stuff Nana. Really appreciate your impact and teaching style

You are absoultely fantastic! This is the gentle introduction to Docker I was looking for. So thanks Nana.

I’m new to docker and this tutorial is absolutely all you need to get started

Thank you so much for these tutorials, literally speechless about how great your explanation is and how you covered the workflow and use case, cheers!

This is one of the best crash courses I have seen on Docker.

It's the first time I get to watch a docker content that's not boring! Thanks

Nana, thank you so much for this awesome video. You have made it so easy to understand especially for some one who has no knowledge of what a container is. Loving your content on youtube.

This is the video I've been looking for for years. It's a huge first step and it is for absolute beginners for sure. Thank you so much for making this amazing work a simple one.

You can't imagine how much I'm loving this beautiful woman. Always great contents with illustrations. Thank you so much Nana !

Fantastic short introduction! Thank you very much. Really enjoyed it 👍

Where have you been my whole life, instantly subscribed thanks for saving me a lot of headache.

Best crash course I've found. was able to dockerize my first project. I feel like I understand the process and workflow a lot better too. thanks!

Thank you, It actually took me 2 days to digest the content but It was greatly explained.

You are a gifted teacher and you know how to support your teaching skill with visuals/presentations. It's like an ideal package we get from you. Absolutely impressive!

Perfect video Nana! Thank you!

One of the best training clearly delivered at warp speed. Simply EXCELLENT!

It would be great if you could make a video where you explain the different types of storage (nfs/distributed), how to address them on premise, it is recommended on the same servers as kubernetes or if it is better with another technology on separate servers, something similar in the cloud. The content you generate is amazingly good, it helps a lot, thanks nana!

You are a god! I've never seen an explanation so fluid like that before. Thank you very much for you splendid class! Thanks for helping the community

Excellent tutorial and introduction ! The way you speak, you explain and you prove things are very enlightening . I'll keep an eye of your tech activities ...

By far the best at explaining everything! Thank you so so much for all your content!

This session was definitely worth it, never came across anyone who explained the concepts for Dockers and containers so clearly on youtube... thanks Nana

It's been an year since I follow your videos on YT. I will frankly say staring with K8s, I have no regret to keep going on !!

Great video. I’m exposed to docker every day and I’ve never properly understood it, but this video fills many of the gaps. Going to watch the full tutorial!