This tutorial is on how to delete a dangling image that cannot be deleted.

Command used in this demo.

1) Delete image
docker image rm IMAGE_NAME

2) Clear screen
clear

3) Directory list
ls

4) Make new directory
mkdir

5) Copy file
cp

6) Revision of Ubuntu
lsb_release -a

7) List docker image
docker image ls

8) List docker container
docker container ls

9) Prune/Delete all dangling containers
docker container prune

https://youtu.be/6vHanXLpHdM