- Step 1: Update System Packages
- Step 2: Install Docker
- Step 3: Docker Post-Installation Steps
- Step 4: Test Docker Installation
If you are looking to containerize your applications and streamline your development process, Docker is a powerful tool that can help you achieve that. In this guide, we will walk you through the steps to install Docker on CentOS, one of the most popular Linux distributions used for containers.
Before we begin, make sure you have the following prerequisites in place:
- A CentOS-based system with root access.
- A reliable internet connection.
- Knowledge of basic Linux command-line operations.
Now, let's get started with the installation.
Step 1: Update System Packages
Before installing any software, it's always a good practice to update your system packages to the latest versions. Run the following command to do so:
sudo yum update -y
Step 2: Install Docker
To install Docker on CentOS, we will use the Docker repository to get the latest version of Docker. Follow the steps below:
- Add the Docker repository to your system:
sudo yum install -y yum-utils sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
- Install Docker using the following command:
sudo yum install -y docker-ce docker-ce-cli containerd.io
- Start the Docker service and enable it to start on boot:
sudo systemctl start docker sudo systemctl enable docker
- Verify if Docker is installed correctly:
sudo docker version
Step 3: Docker Post-Installation Steps
By default, Docker requires root privileges to run commands. To avoid using
sudo every time you use Docker, add your user to the
sudo usermod -aG docker your_user
your_user with your actual username.
Step 4: Test Docker Installation
To ensure that Docker is installed correctly, let's run a simple test:
docker run hello-world
This command will download a small Docker image and run a container from it. If everything is set up correctly, you will see a "Hello from Docker!" message indicating that Docker is working.
Congratulations! You have successfully installed Docker on CentOS. Now you can start leveraging the power of containers for your development projects. If you encounter any issues during the installation process, refer to the official Docker documentation or seek help from the vibrant Docker community.
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