How To Install and Use Docker on CentOS 7

How To Install and Use Docker on CentOS 7

How To Install and Use Docker on CentOS 7

Introduction

Docker is a platform for developers and system administrators to develop, deploy, and run applications with containers. It allows you to package an application with all of its dependencies into a single container that can be deployed across any infrastructure. In this tutorial, we will guide you on how to install and use Docker on CentOS 7.

Prerequisites

  • A CentOS 7 server with root access.
  • A terminal window (Ctrl-Alt-T on Ubuntu).

Step 1: Install Docker

To install Docker on CentOS 7, follow the steps below:

  1. Update your CentOS 7 server:
    2. sudo yum update
  2. Add the Docker repository to your CentOS 7 server:
    3. sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
  3. Install Docker:
    4. sudo yum install docker-ce docker-ce-cli containerd.io
  4. Start and enable Docker:
    5. sudo systemctl start docker
sudo systemctl enable docker
  5. Verify that Docker is installed correctly:
    6. sudo docker run hello-world

Step 2: Use Docker

Now that Docker is installed on your CentOS 7 server, you can start using it to run containers. To run a container, you need to specify an image to run:

sudo docker run <image_name>

You can find images to run on Docker Hub, which is a public repository of Docker images. For example, to run a container with the latest version of the Nginx web server, you can use the following command:

sudo docker run -d -p 80:80 nginx

This command tells Docker to run a container in detached mode (-d) and to map port 80 on the container to port 80 on the host (-p 80:80). The image to run is nginx. Once the container is running, you can access the Nginx web server by going to http://<your_server_ip> in your web browser.

Conclusion

In this tutorial, we have shown you how to install and use Docker on CentOS 7. Docker is a powerful tool for developers and system administrators, allowing you to package applications with their dependencies and run them anywhere. With Docker, you can easily deploy and scale your applications across any infrastructure.

Keywords: Docker, CentOS 7, installation, tutorial, container, image, repository, Nginx, web server.

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