The Complete Practical Docker Guide - What is CMD in the Docker Image

The video tutorial explains the concept of Docker containers, focusing on the Hello World image. It describes how Docker images are composed of layers, each with specific instructions that dictate container behavior. The tutorial also covers how to inspect Docker containers to find command instructions and provides a brief preview of the next lecture on container usage.

What is the primary function of a Docker container as introduced in the Hello World example?

• To manage network settings

• To print text to the terminal

• To compile code

• To create a virtual machine

What is a key characteristic of Docker images as explained in the tutorial?

• They are only compatible with Windows

• They do not require a base image

• They contain multiple layers with specific instructions

• They are single-layered

In the example provided, what is the base image used?

• Fedora

• Ubuntu

• CentOS

• Alpine

What command is used to inspect a Docker container to find the executed command?

• docker commit

• docker run

• docker inspect

• docker build

What is the purpose of the CMD instruction in a Docker container?

• To indicate which process to start

• To define the base image

• To specify the network settings

• To set environment variables