1. Docker Ubuntu 20.04 Python
2. Docker 20.04 Ubuntu
3. Docker 20.04 Image
4. Docker Ubuntu 20.04 Timezone
5. Docker Ubuntu 20.04 Systemd
6. Nvidia Docker 20.04

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

The Docker client contacted the Docker daemon. The Docker daemon pulled the 'hello-world' image from the Docker Hub. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. The Docker daemon streamed that output to the Docker client, which sent it. Step 3 – Install Docker and Docker Compose By default, the latest version of Docker is not available in the Ubuntu 20.04 default repository, so it is a good idea to add the Docker official repository in your system. Docker privileged is one of many useful features of this powerful virtualization platform. Before you start working in privileged mode, make sure you understand how it works. In this tutorial, you will learn what privileged Docker containers are, when to use them, and whether it is a good option for you. Installing Docker on Ubuntu 20.04 is easy with this tutorial. Learn to install, start, and run Docker. Get started with this powerful virtualization tool!

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.

Docker Ubuntu 20.04 Python

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:

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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Docker is a combo of ‘platform as a service’ products and services which use OS virtualisation to provide software in packages called containers.

Containers contain everything an app, tool or service needs to run, including all libraries, dependencies, and configuration files. Containers are also isolated from each other (and the underlying host system), but can communicate through pre-defined channels.

This introduction to Docker video will give you a quick top-level overview of the tech and how it works:

Because Docker is open source software it’s not only free to use, but free to adapt, extend, hack, or build on. In this guide I cover installing Docker on Ubuntu 20.04 LTS (Focal Fossa), but the same steps may also work on older versions of Ubuntu, including Ubuntu 18.04 LTS.

In this post you will learn how to install Docker from the regular Ubuntu repository, how to enable Docker to start automatically at system boot, and how to install Docker images and run them locally.

But this isn’t a deep dive. This tutorial is intentionally short and to the point. This is so you spend less time reading and more time doing.

Install Docker from Ubuntu Repository

There are two hard requirements to install Docker on Ubuntu 20.04:

• You need to have sudo access
• You need to be connected to the internet

If you’re managing or setting up an Ubuntu server then you (probably) meet both of these requirements already, but do check before you begin.

Step 1: Install Docker from the main Ubuntu repository. Do this using the apt command and the docker.io package name (note: the package name is not simply ‘docker’):

Ubuntu will download the latest version of Docker from its archives, unpack it, and install it on your system.

Step 2: Make Docker start automatically on system boot:

Step 3: Test it.

Now that Docker is installed and running you should verify that everything is working okay. This can be done using the hello-world app. From the command line run:

When you run this command you’ll see a lengthy message informing you that the ‘installation appears to be working correctly’.

But look closely at the message:

You’ll notice something interesting near the start: Docker was ‘unable to find’ the a ‘hello-world’ image. But instead of quitting it searched for and downloaded it from Docker Hub.

Docker 20.04 Ubuntu

Which leads us neatly on to…

Step 4: Find and install Docker images.

Now you’re set-up the world (or rather the Docker ecosystem) is your oyster, and Docker Hub your port of call. Docker Hub is billed as ‘the world’s largest library and community for container images’. Any image available on Docker Hub can be installed on your system too.

Let’s look at how to do that.

To search for an image on Docker Hub run the docker command with the search subcommand, like so:

Docker 20.04 Image

For example, I want to search for Alpine Linux on Docker Hub so I run docker search alpine. A list of matching images (which match the term alpine) will appear. I want the official Alpine image so I look in the OFFICIAL column for the word OK

When you find the image you want to use you can download it using the pull subcommand, For example, to install Alpine Linux I run sudo docker pull alpine.

To run a downloaded image you need to add the run subcommand and the name of the image, e.g., sudo docker run alpine.

Docker Ubuntu 20.04 Timezone

If you want to run an image as a container and get instant ‘interactive terminal’ shell access add the -it flag. For example: I run sudo docker run -it alpine and it drops me straight into the Alpine container, ready to work:

To exit the ‘interactive terminal’ type the word exit and hit enter.

Check out the Docker Docs page for a wealth more info on how to use, admin, manage, and maintain your containers.

A couple of useful commands to know include docker ps -a to list all images you’ve used (and see their container ID/name); docker stop {container id} to close an image down; and when you’re done with a container remove it using the docker rm command, again adding the the container ID/name at the end.

Docker Ubuntu 20.04 Systemd

Going Further

In this guide we looked at installing Docker on Ubuntu 20.04 and getting official images installed. But this is only the beginning of what possible with Docker.

Nvidia Docker 20.04

One possible avenue to explore is installing Docker rootless. This is an experimental feature and not (yet) easy to enable. But the effort required to set it up is worth it if you’re concerned about security and stability.

If there are topics you want to see a similar to-the-point tutorial on (be it Docker related or otherwise) do drop a note down in the comments or via my usual e-mail.