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adenner / gist:29417329f83d8b0aac7cd234a726ee2f
Last active Feb 15, 2020
ohshit-docker or a quick help with docker
View gist:29417329f83d8b0aac7cd234a726ee2f
As a little bit of an introduction, it is helpful to sometimes think of docker as running containers in seperate "lightweight" VMs. This is not really the case ( but it is a helpful abstraction for this brief intro.
Just to be sure where we are at lets try running a couple of commands to be sure we are in a good state.
It is an easy thing to do after a while to have a large amount of wasted space due to old and intermedate images sitting arround but not being used. An easy quick way to clean that up is with the "docker system prune". As the warning will tell you,
This will remove:
- all stopped containers
- all networks not used by at least one container
- all dangling images
- all dangling build cache
-a added to the command will also prune any stopped and or unused images as well.
A good way to cut down on the need to do this is to include the --rm comand to your docker run commands.
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