Docker is like a special tool that helps people make and run computer programs easily. It uses something called containers, which are like small packages for programs. These containers make it simple to create, send out, and run programs on computers.
Why Docker is Important? A lot of big companies really like Docker because it’s super good at handling lots of programs all at once. They use it to send out and run their programs smoothly.
Getting Started with Docker Okay, now we’re going to learn how to start using Docker. The first thing we need to do is put Docker on our computer. I’m going to explain how to do that step by step.
How to Put Docker on Ubuntu? We’re using a computer system called Ubuntu, and we want to install Docker on it.
Step 1: First, we need to install Docker on our computer. Think of this like getting a new app on your phone. You need to go to a special place to download it.
Step 2: Once you find the special place to download Docker, follow the instructions carefully. It’s a bit like following a recipe. You need to do each step just right.
Step 3: After you’ve followed all the steps and the installation is complete, you’ll have Docker on your computer, ready to use!
So, that’s it! Docker is a cool tool that helps with computer programs, and you’ve learned how to put it on your Ubuntu computer. Just follow those steps, and you’ll have it in no time!
What’s Docker and Why is it Cool?
Docker is a super useful tool that helps with computer programs. It’s like a free and open toolbox for making, sending, and running apps. But what makes it really cool is that it lets you separate your apps from your computer, so you can release your software (like games or apps) really quickly. It’s like a fast track for sending out your cool creations!
How to Practice Docker
Now, if you want to learn how to use Docker, there are three ways to do it:
a) Sandbox – Play With Docker: Imagine you get a free toy for four hours every day. Well, you can get a free Docker play area for four hours each day too! It’s like a special place for you to practice with Docker, and it’s sponsored by Docker themselves.
b) Create a Virtual Machine: This one’s a bit like making a pretend computer inside your real computer. You can do it for free on services like Azure or AWS (that’s Amazon’s cloud). Once you’ve got your pretend computer set up, you can put Docker on it.
c) Use Your Own Computer: If you want, you can also put Docker right on your own computer. It’s like having a mini Docker playground right at home.
Installing Docker on Ubuntu
Alright, now let’s talk about how to get Docker on your Ubuntu computer. First, you need to make sure your computer meets some requirements:
- You should have the 64-bit version of Ubuntu. Think of it like having the right puzzle piece.
- Your Ubuntu computer should have a special user (not the main boss) with some extra powers called Sudo privileges. It’s like having a helper.
- And you should have a basic firewall set up, like a digital shield for your computer.
Once your computer is all set with these things, you’re ready to install Docker! It’s like adding a new app to your phone, but for your computer. Just follow the instructions, and soon you’ll have Docker ready to use. It’s a bit like following a recipe for a yummy dish, step by step!
Installing Docker on Ubuntu: A Step-by-Step Guide
Hey there! Ready to install Docker on your Ubuntu computer? Don’t worry; we’ll take it step by step, just like following a recipe.
Step 1: Update Software Repositories Think of this like checking for updates on your phone. Open the terminal and type:
$ sudo apt-get update -y
Step 2: Uninstall Previous Docker Versions (Optional) Only do this step if you had Docker before and want a fresh start. In the terminal:
$ sudo apt-get remove docker docker-engine docker.io containerd runc
Step 3: Get Ready for Docker Now, we need some special tools to talk to Docker. In the terminal:
$ sudo apt-get update
$ sudo apt-get install
ca-certificates
curl
gnupg
lsb-release
Step 4: Add Docker’s Special Key Docker has a secret key. Let’s add it to our system:
sudo mkdir -m 0755 -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
Step 5: Configure Docker Repository This is like telling your computer where to find Docker. In the terminal:
echo
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
Step 6: Install Docker Now, let’s actually install Docker! In the terminal:
$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
Step 7: Start Docker Time to turn on Docker, just like you turn on a computer:
sudo systemctl start docker
sudo systemctl enable docker
Step 8: Check Docker Status Let’s see if Docker is happy and running:
$ sudo systemctl status docker
Step 9: Check Versions Want to know which versions you have? Type these in the terminal:
$ docker --version
$ docker compose version
That’s it! You’ve done it! You’ve successfully installed Docker on your Ubuntu computer. Now you’re all set to use Docker for cool stuff like making and running apps. Great job!
Get a FREE Guide: Installing Docker on Ubuntu
Awesome news! You can download a FREE guide that shows you all the steps to install Docker on Ubuntu. It’s like a helpful map to get you started with Docker.
Join a FREE Masterclass
But wait, there’s more! You can also join a FREE masterclass. In this class, you’ll learn about some really cool stuff:
1. Kubernetes vs Docker: What’s the Difference? We’ll explore what makes Kubernetes different from Docker. It’s like comparing apples to oranges, but in the tech world!
2. Virtual Machine vs Container: What’s the Deal? Ever wondered how virtual machines and containers are different? We’ll break it down for you, like comparing a big box to a tiny one.
3. Why You Should Learn Docker and Kubernetes Find out why learning Docker and Kubernetes is a fantastic idea. It’s like discovering a treasure chest of opportunities in the tech world!
4. Job Opportunities for Kubernetes Administrators We’ll talk about all the cool job opportunities waiting for Kubernetes administrators. It’s like opening the door to a world of possibilities.
5. Hands-On Labs for Certified Kubernetes Administrator (CKA) Want to know what it takes to become a Certified Kubernetes Administrator (CKA)? We’ll give you a sneak peek into the hands-on labs you’ll need to do. It’s like a practice test for a super important exam.
So, don’t miss out! Register for our FREE Masterclass and get ready to dive into the world of Docker, Kubernetes, and exciting tech opportunities. It’s like an adventure waiting to happen!
