How to Install Docker on Rocky Linux

Step 1: Update Your System

Before installing Docker, make sure your system is up-to-date. Open a terminal and run the following commands:

sudo dnf update -y

Step 2: Install Docker Dependencies

Docker requires some dependencies to be installed. You can install them using the following command:

sudo dnf install -y dnf-plugins-core

Step 3: Add Docker Repository

Add the Docker repository to your system:

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

Step 4: Install Docker Engine

Install Docker Engine on Rocky Linux:

sudo dnf install -y docker-ce docker-ce-cli containerd.io

Step 5: Start and Enable Docker

Start the Docker service and enable it to start automatically on boot:

sudo systemctl start docker
sudo systemctl enable docker

Step 6: Verify Docker Installation

Verify that Docker has been successfully installed:

sudo docker --version

Step 7: Test Docker

Test Docker by running a simple "Hello World" container:

sudo docker run hello-world

Step 8: Add Your User to the Docker Group (Optional)

If you'd like to avoid using sudo for Docker commands, add your user to the Docker group:

sudo usermod -aG docker $USER

Log out and back in for the changes to take effect.

Step 9: Test Docker as a Regular User (Optional)

As a regular user, test Docker:

docker run hello-world

This should produce the same "Hello World" output as before.

That's it! You've successfully installed Docker on Rocky Linux. You can now use Docker to run containers and manage containerized applications on your system.