Revisited and updated on November 04th, 2023.

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Docker

Docker is a platform for developing, shipping, and running applications in containers.

Containers are lightweight, portable, and self-sufficient units that can package an application and its dependencies, including libraries and configuration files, into a single, consistent environment.

This allows developers to create, deploy, and manage applications more efficiently, regardless of the underlying infrastructure.

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Let's get down to business

shall we?

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Check your OS (optional)

This step is just to make sure you have Deepin Linux installed.

lsb_release -a
hostnamectl
cat /etc/os-release
uname -a

Output

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Update packages info

sudo apt-get update

Running sudo apt-get update is an important step before installing or upgrading packages on your system because it ensures that you have the most up-to-date information about available packages.

Without updating the package index, you might not see the latest versions of software or be able to install new packages that have been added to the repositories since the last update.

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Install dependencies

sudo apt-get install -y \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

or

sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

In summary, the provided command is used to install essential packages and utilities that are commonly required for adding external repositories, securely fetching packages over HTTPS, and managing software sources on an Ubuntu system. These packages are often necessary for setting up and maintaining software on your system.

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Download Docker GPG (GNU Privacy Guard) key

curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

Output

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Check Docker GPG key

The sudo apt-key fingerprint command is used to display the fingerprint of a GPG key that has been added to the APT (Advanced Package Tool) keyring on a Debian-based Linux system. The fingerprint is a unique identifier for a GPG key, and it's used to verify the authenticity of the key.

The output would be something like the following:

0EBFCD88 is the key ID or key fingerprint of the GPG key for which you want to retrieve information. In this case, 0EBFCD88 is typically the GPG key associated with the Docker repository.

The sudo apt-key fingerprint command is used to display the fingerprint of a GPG key that has been added to the APT (Advanced Package Tool) keyring on a Debian-based Linux system. The fingerprint is a unique identifier for a GPG key, and it's used to verify the authenticity of the key.

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Docker repository for GPG key

printf 'deb [arch=amd64] https://download.docker.com/linux/debian buster stable\n'| sudo tee /etc/apt/sources.list.d/docker-ce.list

Output would be something like the following:

The command constructs a repository source entry for Docker, based on your distribution's codename (obtained using lsb_release -cs), and then writes that entry to the /etc/apt/sources.list.d/docker.list file.

This is how you add a Docker repository source to your APT configuration on a Debian-based system, ensuring that APT can find and install Docker packages from the specified repository.

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Update package info

sudo apt-get update

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Install docker

sudo apt-get install docker-ce docker-ce-cli containerd.io

Output

docker-ce is the package name for Docker CE (Community Edition), which is the version of Docker designed for community use and development environments.

Docker CE Command Line Interface (CLI) is available through the package docker-ce-cli. It provides the command-line tools for working with Docker containers and images.

containerd.io is the package name for containerd, which is an essential component of the Docker runtime that manages containers and provides a basic infrastructure for container execution.

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Check installation

Through version

docker --version

Output

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Through executable path

which docker

Output

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Check status

sudo systemctl status docker

Output

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Download docker compose

sudo curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

Output

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Done

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Celebrate

You've made it!

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Let's become friends

• Github

• LinkedIn

• Hashnode

• Youtube

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Final thoughts

I hope this article has been helpful to you. Please feel free to reach out if you have any questions. Your thoughts, suggestions, and corrections are more than welcome.

By the way, don't hesitate to drop your suggestions for new blog articles.

I look forward to seeing you next time.

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