How to add Docker In Ubuntu

Getting Started with Docker on Ubuntu

Docker is a powerful container management tool that allows you to run applications or even entire operating systems in isolated environments called containers. This modern technology has rapidly evolved and is now widely adopted across many industries.

Official Docker website: https://www.docker.com/

Step-by-Step Docker Installation and Setup on Ubuntu

Step 1: Update System Packages

Before installing Docker, it's recommended that you update your system to ensure all packages are up to date. Open your terminal and run:

sudo apt-get update

Step 2: Install Docker

Once the system is updated, install Docker using the following command:

sudo apt-get install -y docker.io

Step 3: Start the Docker Service

After installation, Docker should automatically start. This service is also known as the Docker Engine or Docker Daemon.

To ensure that Docker is running:

sudo systemctl start docker
sudo systemctl enable docker

Step 4: Verify the Docker Version

To check which version of Docker is installed:

docker --version

Step 5: Log In to Docker Hub

Log in to your Docker Hub account to access and manage Docker images. If you don't have an account, sign up at https://hub.docker.com.

docker login

Step 6: Explore Docker Images

Once logged in, visit Docker Hub and click the Explore button to browse available container images:
👉 Docker Hub Explore

Step 7: Pull the CentOS Image

Back in your terminal, use the docker pull command to download the latest CentOS image:

sudo docker pull centos:latest

Step 8: List Installed Docker Images

To confirm that the CentOS image (or any others) has been downloaded successfully:

sudo docker images

Step 9: Run a CentOS Container

Now, let's start a CentOS container and access its shell. Use the following command:

sudo docker run -it centos /bin/bash

This command launches an interactive CentOS terminal inside the container.

You’re All Set!

You now have Docker installed, are logged in to Docker Hub, and are running a CentOS container on Ubuntu. You're ready to start building, testing, and deploying containerized applications!

Souy Soeng