If you deal with Docker on a daily basis, you need to know a few commands. If you’re like me and forget these things, here’s a cheat sheet to help ;)
Summary
Listing
Images on your machine
Lists all the images on your machine, including the dangling ones
$ docker images -a
Running containers
$ docker ps
All containers
And their info
$ docker ps -a
Only the IDs of all containers
$ docker ps -qa
Removing
A container that was stopped
$ docker rm ID
All containers that were stopped
$ docker rm $(docker ps -qa)
An image from the system
If the image isn’t in use, you can remove it using the command below along with the image ID
$ docker rmi ID
All images from the system
Removes ALL Docker images that aren’t in use from your machine. Use with care!
It’ll show an error if any image is in use.
$ docker rmi $(docker images -qa)
All images from the system
Removes ALL Docker images that aren’t in use from your machine. Use with care!
It’ll ignore images in use.
$ docker system prune --all
Killing
One or more containers
Just pass a list of IDs to kill more than one container
$ docker kill ID
Some useful options to know
-a
Most, if not all, Docker commands and subcommands have an -a option which comes from all.
–rm
Same thing happens with the --rm option. When used, it indicates that the container should be removed after its execution.
-q
Most, if not all, Docker commands and subcommands have a -q option that lists only the IDs.
