Welcome to our step-by-step Docker installation guide for Rocky Linux 9. In this easy tutorial, we'll show you how to install Docker on your Rocky Linux 9 system. Whether you're a beginner or an experienced user, our quick and hassle-free Docker setup will get you up and running with Docker in no time.
By following our Docker Rocky Linux 9 installation instructions, you'll learn all the necessary steps to configure Docker on your system. With our comprehensive Docker setup tutorial, you'll have the knowledge and confidence to start working with Docker containers on Rocky Linux 9.
So, let's dive in and discover how to install Docker on Rocky Linux 9 today. Get ready for a smooth and seamless Docker experience!
Adding the Docker Repository
To install Docker on Rocky Linux 9, you need to add the Docker repository. Follow these steps to configure the repository URL and gain access to the latest version of Docker Engine, containerd, and Docker Compose:
- Open a terminal on your Rocky Linux 9 system.
- Use the
dnf config-managercommand to configure the Docker repository:
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
- Once the repository is added, update the package lists using the following command:
sudo dnf update
- You have successfully added the Docker repository to your Rocky Linux 9 system. Now you can proceed to the next section to install Docker.
Configuring Docker Repository on Rocky Linux 9
Configuring the Docker repository on Rocky Linux 9 is a crucial step in the installation process. By adding the repository URL and updating the package lists, you ensure that you can access the latest Docker packages for Rocky Linux 9. This allows you to take advantage of the latest features and improvements in Docker Engine, containerd, and Docker Compose.
Installing Docker on Rocky Linux 9
Once you have added the Docker repository to your Rocky Linux 9 system, it's time to install Docker Engine and its dependencies. The following steps outline the installation process:
- Open a terminal and use the command
dnf install docker-ce docker-ce-cli containerd.ioto install the Docker packages on your system. - After the installation is complete, start the Docker service by running
systemctl start docker. - To ensure that the Docker service starts automatically on system reboot, enable it with the command
systemctl enable docker.
By following these steps, you will have Docker up and running on your Rocky Linux 9 system. The Docker Engine and its dependencies will be installed, and the Docker service will be started and enabled to run on system startup.
With Docker installed, you can begin working with containers on Rocky Linux 9. The next section will cover how to start and enable the Docker service to ensure it runs continuously in the background.
Starting and Enabling the Docker Service
Once you have successfully installed Docker on Rocky Linux 9, the next step is to start and enable the Docker service. This ensures that Docker runs automatically on system reboot, allowing you to conveniently use Docker without any manual intervention.
To start the Docker service, you can use the systemctl utility. Open the terminal and execute the following command:
sudo systemctl start docker
This command starts the Docker service, and you should see a confirmation message indicating that the service has been started.
To enable the Docker service to start automatically on system reboot, use the following command:
sudo systemctl enable docker
Enabling the Docker service ensures that it starts automatically every time you boot your system, allowing you to seamlessly work with Docker containers on Rocky Linux 9.
Running Docker without Sudo
When working with Docker on Rocky Linux 9, you may have noticed that running Docker commands requires sudo access by default. However, there is a way to run Docker commands without sudo, making it more convenient and efficient for everyday use.
The first step is to add your user to the Docker group. This will grant your user the necessary permissions to interact with Docker without the need for sudo. To add your user to the Docker group, open a terminal and use the command sudo usermod -aG docker your_username. Replace your_username with your actual username. Once the command is executed, you will need to restart your system for the changes to take effect.
After restarting, you can verify that your user has been added to the Docker group by running the command id -nG. You should see "docker" in the list of groups associated with your user. This confirms that you now have non-root access to Docker.
With your user now added to the Docker group, you can run Docker commands without sudo. You no longer need to prepend each command with sudo, simplifying your workflow and saving you time. Enjoy the convenience of running Docker commands as a non-root user on Rocky Linux 9!
Testing Docker Installation
Now that you have successfully installed Docker on your Rocky Linux 9 system, it's time to test the installation and ensure everything is working correctly. Here are a few steps you can follow to verify your Docker setup:
- Open a terminal window and run the following command:
docker run hello-world. This will download and run a small containerized application called "hello-world". If everything is set up properly, you should see a message indicating that Docker is working correctly. - To check the status of Docker on your Rocky Linux 9 system, use the command:
systemctl status docker. This will display detailed information about the Docker service, including whether it is running or not.
By running the "hello-world" image and checking the Docker service status, you can ensure that Docker is installed and functioning as expected on your Rocky Linux 9 system.
Additional Testing Options
If you want to explore Docker further and test more advanced functionalities, you can try the following:
- Build your own Docker image using a Dockerfile. This allows you to customize and create containerized applications tailored to your specific needs.
- Run a pre-built Docker image of your choice from the Docker Hub. The Docker Hub is a public repository of Docker images created and shared by the community. You can search for images based on your requirements and run them on your Rocky Linux 9 system.
- Experiment with Docker networking and create containers that can communicate with each other over the network.
By exploring these additional testing options, you can gain a better understanding of Docker's capabilities and how it can empower your development and deployment workflows on Rocky Linux 9.
Updating and Uninstalling Docker
Once you have Docker installed on your Rocky Linux 9 system, it's important to keep it up to date with the latest features and bug fixes. To update Docker to the latest version, you can use the dnf command, which is the package manager for Rocky Linux 9. By running the appropriate dnf command, you can update the Docker packages and ensure that you have the most recent version of Docker installed on your system.
If, for any reason, you want to uninstall Docker from your Rocky Linux 9 system, you can also use the dnf command. This will remove the Docker packages, as well as any associated data directories. It's important to note that uninstalling Docker will permanently remove all Docker containers, images, and data on your system. Therefore, it's recommended to back up any important data before proceeding with the uninstallation process.
Updating or uninstalling Docker on Rocky Linux 9 is a straightforward process thanks to the dnf command. By keeping your Docker installation up to date or removing it when necessary, you can ensure that you have the best Docker experience on your Rocky Linux 9 system.
Conclusion
Docker on Rocky Linux 9 provides a seamless and efficient way to run container workloads on your server. By following the step-by-step installation guide, you can easily set up Docker and start working with containers. The official Docker repository offers all the necessary packages for Rocky Linux 9, ensuring a smooth installation process.
Whether you're a developer, system administrator, or just someone eager to explore the world of containers, Docker on Rocky Linux 9 offers a powerful solution. The ability to update or uninstall Docker using the dnf command gives you flexibility in managing your Docker setup as per your requirements.
In summary, Docker on Rocky Linux 9 is a reliable and user-friendly tool for containerization. With the comprehensive guide provided, you can confidently install Docker and dive into the world of containerized applications on Rocky Linux 9. Enjoy the benefits and versatility that Docker brings to your server!
