TzookB

Docker removing unused images and container

Tue Feb 27 2018

While learning docker and following through dozens of tutorials around the web, the amount of new images I downloaded and containers I created can easily be above the 50-60 scale

The problem with that, is that most of them are not used!

most of them have the annoying in the image name, and all the containers are stopped.

I decided to start clearing stuff, so even though I would be happy to go one by one I decided to batch the process, and here the 2 tiny commands that could help you as well.

remove all stopped containers:

docker rm $(docker ps -a | grep -v Up | awk '{print $1}')

how it works?

  • docker ps -a lists all containers
  • grep -v Up select only the rows where the container is not Up
  • awk {print $1} take only the container id
  • now after we took all the stopped container ids we simply remove them with the docker command.

remove all images with :

docker rmi $(docker images | grep "<none>" | awk '{print $3}')

how it works?

  • docker images list all images
  • grep take only the ones that contain
  • awk {print $3} grab their ids
  • now remove them with the docker command