Linux Tactic

Docker on Raspberry Pi: Installation and Basic Commands

Installing Docker on Raspberry Pi

Are you looking to install Docker on your Raspberry Pi? In this article, we will guide you through the process of installing Docker on your Raspberry Pi and executing Docker commands without administrative privileges.

Prerequisites

Before we begin, ensure that your Raspberry Pi is running the latest version of Raspbian and that you have SSH enabled.

Installing Docker

To install Docker, we will begin by running the Docker installation script. This script will automate the installation of Docker on your Raspberry Pi. Before running the script, ensure that you have updated all the packages on your Raspberry Pi to their latest version.

You can run the Docker installation script by issuing the following commands:

“`

$ sudo curl -sSL get.docker.com | sh

“`

This command will download and automatically execute the latest Docker version compatible with your Linux distribution. Once the script has finished, you will have Docker installed on your Raspberry Pi.

Executing the Docker Command Without Sudo

By default, Docker commands require administrative privileges. To execute Docker commands without sudo, you can add your user account to the docker group.

To do this, issue the following command:

“`

$ sudo usermod -aG docker pi

“`

This command will add the user ‘pi’ to the docker group, allowing the user to execute Docker commands without administrative privileges. To apply the changes, you will need to log out and log in again to your Raspberry Pi.

To test if the change has been applied successfully, you can issue the following Docker command:

“`

$ docker run hello-world

“`

This command will pull down a test image, and if it executes successfully, it will output a ‘hello-world’ message.

Basic Docker Concepts and Commands

In this section, we will cover the fundamental concepts and commands used in Docker.

Docker Images

A Docker image is a self-contained, immutable binary file that includes everything required to run a piece of software. Docker images are created from a Dockerfile, which is a script that includes all the necessary instructions required to build the image.

Docker Hub is a registry service for Docker images, allowing users to share and collaborate on Docker images. Docker search can be used to search for Docker images available on Docker Hub or any other registered registry.

For example, to search for a Debian image on Docker Hub, you can issue the following command:

“`

$ docker search debian

“`

This command will display all the Debian images available on Docker Hub.

Docker Containers

Docker containers are instances of Docker images that are running in a runtime environment. A container is a lightweight and portable executable package of software that includes everything required to run the application.

Docker container commands can be used to manage, start, stop or remove containers. For example, to start a new container based on a Debian image, you can issue the following command:

“`

$ docker run -it debian /bin/bash

“`

This command will start a new interactive container with a command prompt.

To list all running Docker containers, you can issue the following command:

“`

$ docker ps

“`

This command will output a list of all running Docker containers. To delete a container, you can use the Docker container command with the container ID or name.

For example, to delete a container with the ID ‘1234’, you can issue the following command:

“`

$ docker container rm 1234

“`

This will remove the container from your system.

Conclusion

In this article, we covered the basics of installing Docker on your Raspberry Pi and executing Docker commands without administrative privileges. We also covered the fundamental concepts and commands used in Docker, including Docker images and containers.

With this knowledge, you are well on your way to effectively using Docker to create, run, and manage your applications. This article covered the process of installing Docker on Raspberry Pi and executing Docker commands without administrative privileges.

Additionally, we discussed the fundamental concepts and commands used in Docker, including images and containers. By following the steps outlined in this article, you’ll be well on your way to creating, running, and managing your applications effectively using Docker.

Remember, Docker offers an efficient way to manage server space, making it an essential tool for both beginners and experts in the field of software development.

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