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This tutorial covers how to install Docker on an Ubuntu 20.04 machine. Docker is an open-source containerization platform that allows you to quickly build, test, and deploy applications as portable containers that can run virtually anywhere. Furthermore, if you were to leave the image tag blank, Docker would run the latest image version (i.e. Docker run ubuntu docker run ubuntu:latest). Once we issue the command, Docker starts the run process by checking if the image is on your local machine. If Docker can’t find the image, it will check Docker hub and download. Docker is a powerful platform for building, managing, and running containerized applications. In this tutorial, you'll learn how you can use Docker to package and distribute your applications. We'll show you how to install the tools, download and run an off-the-shelf image, and then build images of our own.

• Tutorial Docker Ubuntu Windows 10
• Docker Tutorial Ubuntu 18
• Tutorial Docker Ubuntu Download

Docker Tutorial provides basic and advanced concepts of Docker. Our Docker Tutorial is designed for both beginners as well as professionals.

Docker is a centralized platform for packaging, deploying, and running applications. Before Docker, many users face the problem that a particular code is running in the developer's system but not in the user's system. So, the main reason to develop docker is to help developers to develop applications easily, ship them into containers, and can be deployed anywhere.

I tend to always run those containers with the -rm flag to remove them when I exit. Instead I create custom docker images based on the Ubuntu (or the.ux I actually like better) as the tutorial describes. Second; Docker will not magically behave like a server node. Not in the way an Ubuntu instance on Amazon or Azure does. In this tutorial, you'll learn two ways of installing Docker Compose on Ubuntu: Installing Docker Compose from Ubuntu's repository: Easier method but may not have the latest version of docker compose; Installing the latest Docker Compose using PIP: Gets you the newer docker compose version; Keep in mind that to use Docker Compose, you must have.

Docker was firstly released in March 2013. It is used in the Deployment stage of the software development life cycle that's why it can efficiently resolve issues related to the application deployment.

What is Docker?

Docker is an open-source centralized platform designed to create, deploy, and run applications. Docker uses container on the host's operating system to run applications. It allows applications to use the same Linux kernel as a system on the host computer, rather than creating a whole virtual operating system. Containers ensure that our application works in any environment like development, test, or production.

Docker includes components such as Docker client, Docker server, Docker machine, Docker hub, Docker composes, etc.

Let's understand the Docker containers and virtual machine.

Docker Containers

Docker containers are the lightweight alternatives of the virtual machine. It allows developers to package up the application with all its libraries and dependencies, and ship it as a single package. The advantage of using a docker container is that you don't need to allocate any RAM and disk space for the applications. It automatically generates storage and space according to the application requirement.

Virtual Machine

A virtual machine is a software that allows us to install and use other operating systems (Windows, Linux, and Debian) simultaneously on our machine. The operating system in which virtual machine runs are called virtualized operating systems. These virtualized operating systems can run programs and preforms tasks that we perform in a real operating system.

Containers Vs. Virtual Machine

Why Docker?

Docker is designed to benefit both the Developer and System Administrator. There are the following reasons to use Docker -

• Docker allows us to easily install and run software without worrying about setup or dependencies.
• Developers use Docker to eliminate machine problems, i.e. 'but code is worked on my laptop.' when working on code together with co-workers.
• Operators use Docker to run and manage apps in isolated containers for better compute density.
• Enterprises use Docker to securely built agile software delivery pipelines to ship new application features faster and more securely.
• Since docker is not only used for the deployment, but it is also a great platform for development, that's why we can efficiently increase our customer's satisfaction.

Advantages of Docker

There are the following advantages of Docker -

• It runs the container in seconds instead of minutes.
• It uses less memory.
• It provides lightweight virtualization.
• It does not a require full operating system to run applications.
• It uses application dependencies to reduce the risk.
• Docker allows you to use a remote repository to share your container with others.
• It provides continuous deployment and testing environment.

Disadvantages of Docker

There are the following disadvantages of Docker -

• It increases complexity due to an additional layer.
• In Docker, it is difficult to manage large amount of containers.
• Some features such as container self -registration, containers self-inspects, copying files form host to the container, and more are missing in the Docker.
• Docker is not a good solution for applications that require rich graphical interface.
• Docker provides cross-platform compatibility means if an application is designed to run in a Docker container on Windows, then it can't run on Linux or vice versa.

Docker Engine

Tutorial Docker Ubuntu Windows 10

It is a client server application that contains the following major components.

• A server which is a type of long-running program called a daemon process.
• The REST API is used to specify interfaces that programs can use to talk to the daemon and instruct it what to do.
• A command line interface client.

Prerequisite

Before learning Docker, you must have the fundamental knowledge of Linux and programming languages such as java, php, python, ruby, etc.

Audience

Our Docker Tutorial is designed to help beginners and professionals.

Problem

We assure that you will not find any difficulty while learning our Docker tutorial. But if there any mistake, kindly post the problem in the contact form.

Docker Compose is a Python program that lets you easily deploy multiple containers on a server.

As you start exploring Docker, you'll learn that often to run a certain web-app, you'll need to run various services (like database, web-server etc) in different containers.

Deploying multiple containers is a lot easier with Docker Compose.

In this tutorial, you'll learn two ways of installing Docker Compose on Ubuntu:

• Installing Docker Compose from Ubuntu's repository: Easier method but may not have the latest version of docker compose
• Installing the latest Docker Compose using PIP: Gets you the newer docker compose version

Keep in mind that to use Docker Compose, you must have Docker installed on Ubuntu.

Install Docker Compose from Ubuntu's repository

This is the easiest and recommend method. Unless you need the latest Docker Compose version for some specific reasons, you can manage very well with the docker compose version provides by Ubuntu.

Docker Compose is available in the universe repository of Ubuntu 20.04 and 18.04 so make sure to enable it first:

You probably won't need it but no harm in updating the local cache:

Now you can install Docker Compose in Ubuntu using this command:

You can check that Docker Compose is installed successfully by checking its version:

It should show an output like this:

Install the latest Docker Compose on Ubuntu using PIP

PIP stands for 'PIP Installs Package'. It's a command-line based package manager for installing Python applications.

Since Docker Compose is basically a Python program, you can use PIP to install it.

But before you do that, you need to install PIP on Ubuntu first.

Enable the universe repository first.

Install PIP now:

Now that you have PIP installed use it to install Docker Compose for all users on your Linux system:

Check the Docker Compose version to ensure that it is installed successfully:

Docker Tutorial Ubuntu 18

You can see that Docker Compose installed via PIP is more recent version.

I hope you were able to successfully install Docker Compose on Ubuntu with this tutorial. Questions and suggestions are welcome.

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