Docker - A Complete Hands-On Guide - Learn How to Tag the Images and Use Them

The video tutorial explains how to tag and retag images using Docker. It begins with an introduction to the concept of image tagging, followed by a demonstration of listing current images on a machine. The tutorial then provides a step-by-step guide on how to retag images using Docker commands. It emphasizes the importance of verifying the tagging process and discusses why tagging is crucial for image identification. Finally, the video prepares viewers for pushing custom images to a Docker repository, highlighting the need to tag images with the repository name.

What is the primary purpose of tagging Docker images?

• To delete old images

• To identify and manage images

• To change the image size

• To increase image speed

Which command is used to retag a Docker image?

• docker image modify

• docker image tag

• docker image update

• docker image rename

What remains unchanged when you retag a Docker image?

• Image name and version

• Image format and type

• Image ID and size

• Image repository and tag

Why is it important to tag images before pushing them to a Docker repository?

• To reduce their size for faster upload

• To associate them with the correct repository

• To make them compatible with all operating systems

• To ensure they are stored in the correct format

What should you always include in the tag when pushing custom images to Docker?

• The image size

• The repository name

• The image format

• The upload date