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DOCKER

Delete unsused images

docker system prune

Delete all images

docker system prune -a

Images folder

/var/lib/docker/overlay2

Launch

Install and launch image

sudo docker run it -rm -p 12345:80 -d wordpress

-d: detach (background)
-rm: delete container when stopped
-it: interactive mode

List all containers

sudo docker ps -a

Start / Stop / rm

sudo docker start [id]
sudo docker stop [id]
sudo docker rm [id]

Docker compose

Update

docker-compose pull
docker-compose up -d --remove-orphans
docker image prune

Synology

Update

Go to Registry and download new image (mostly the “latest” version)
Go to Container, select the container you need to update and stop it
From Actions menu select “Clear/Reset”
Start the container again