This video tutorial demonstrates how to install Docker on a CentOS system. It covers the installation of prerequisites, configuration of Docker repositories, and the installation of Docker packages. The tutorial also explains how to start the Docker service and verify its status. Finally, it shows how to run a Hello World container to ensure Docker is working correctly.

What are the prerequisite RPMs needed for Docker installation on CentOS?

• Git and Node.js

• Yum and RPM

• Python and Pip

• Device Mapper persistent data and LVM 2

Which command is used to start the Docker service on CentOS?

• service docker start

• docker start

• init.d/docker start

• systemctl start docker

What is the additional step required after installing Docker on CentOS?

• Configuring network settings

• Starting the Docker service

• Updating the kernel

• Rebooting the system

What message confirms that Docker is working correctly after running the Hello World container?

• Hello from Docker

• Docker is installed

• Docker is running

• Welcome to Docker

What does Docker do if it cannot find the Hello World image locally?

• It installs a default image

• It downloads it from the Docker registry

• It displays an error message

• It skips the process