docker-purge.sh

#!/usr/bin/sh
command -v docker >/dev/null 2>&1 || { echo >&2 "I require docker but it's not installed.  Aborting."; exit 1; }

read -p "
    ##############################################################
    # WARNING! You are about to blow up all your docker stuff    #
    # By entering Y/y you will remove:                           #
    #        - all stopped containers                            #
    #        - all networks not used by at least one container   #
    #        - all volumes not used by at least one container    #
    #        - all dangling images                               #
    #        - all build cache                                   #
    ############################################################## 
    
    Do you wish to continue? [Y/N] 
    " -n 1 -r

echo    # (optional) move to a new line

    # purge all unused stuff

if [[ $REPLY =~ ^[Yy]$ ]]
then
    
    
    echo -e "\033[1;32m Starting to purge all Docker containers, images, volumes & networks  "
    
    docker system prune -f || echo -e "\033[1;31m Failure system prune"

		if [[ ! -z $(docker container ls -aq) ]]
		then 
      # Stop all running containers 
			  docker container stop $(docker container ls -aq) || echo -e "\033[1;31m Fail LS"
    
      # Remove all stopped containers
        docker container rm $(docker container ls -aq)|| echo -e "\033[1;31m Failed Removing Containers"
		fi
		if [[ ! -z $(docker image ls -aq) ]]
		then 
    # Remove all images 
       docker image rm -f $(docker image ls -aq)  || echo -e "\033[1;31m Failure removing images"
    # Keep on pruning 
  	fi
    # remove all unsed images 
    docker image prune -a -f || echo -e "\033[1;31m Failure to image prune"
    
    # prune all volume forcibly 
    docker volume prune -f || echo -e "\033[1;31m Failed pruning volumes"
    # prune unused networks
    docker network prune -f || echo -e "\033[1;31m Failed pruning net"
    
    echo -e "\033[1;32m Done purging Docker stuff "
fi

if [[ $REPLY =~ ^[Nn]$ ]]
then
    echo -e "\033[1;35m That was probably a wise choice, exiting.... "
fi

if [[ ! $REPLY =~ ^[YyNn]$ ]]
then
    echo -e "\033[1;35m Nothing to do, exiting...."
fi