Step-by-step process to install Docker on Alma Linux CentOS

Docker is an open-source containerization platform that allows developers to package, distribute, and run applications in containers. It is a powerful tool for simplifying application deployment and management, as well as for ensuring consistency across different environments.

In this article, we will go through the step-by-step process of installing Docker on Alma Linux and launching your first container.

Step 1: Update Your System

Before installing Docker, it is important to update your system to ensure that all packages are up-to-date. To do this, open a terminal window and run the following command:

sudo dnf update

This will update all the installed packages on your system to their latest versions.

Step 2: Install Docker

Once your system is up-to-date, you can proceed with the installation of Docker. To do this, you need to add the Docker repository to your system by running the following command:

sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

This command will add the Docker repository to your system, which contains the packages needed to install Docker. After adding the repository, run the following command to install Docker:

sudo dnf install docker-ce --nobest -y

This command will download and install the Docker packages on your system. Once the installation is complete, start the Docker service by running the following command:

sudo systemctl start docker

To enable the Docker service to start automatically at system boot, run the following command:

sudo systemctl enable docker

Step 3: Verify the Installation

To verify that Docker has been installed correctly, you can run the following command to check the version:

docker version

This command will display the version of Docker that has been installed on your system.

Step 4: Launch Your First Container

Now that Docker is installed and running on your system, you can launch your first container. To do this, you need to search for an image on Docker Hub that you want to use to launch your container.

For example, to launch an Ubuntu container, run the following command:

sudo docker run -it ubuntu /bin/bash

This command will download the latest version of the Ubuntu image from Docker Hub and launch a new container with an interactive shell.

You can now run any command that you want in the container, just as you would in a regular Ubuntu environment.

Conclusion

In this article, we have gone through the step-by-step process of installing Docker on Alma Linux and launching your first container. Docker is a powerful tool for simplifying application deployment and management, and it can help you ensure consistency across different environments. By following the steps outlined in this article, you can start using Docker to manage your applications in containers.