Docker Command

Note

For documentation about writing images see: Dockerfile examples and best practices

attach vs exec

When wanting to execute something inside a container, you can use either of docker attach ... or docker exec -it ... commands

The main difference between these two commands is that attach will kill PID 1 when you disconnect from your container.

The exec command do not kill PID 1, so your container will continue running

Print all digest with full sha1

docker images --digests

Print only ids

docker images ... -q

Filter images

docker images --filter=reference='registry/*'
docker images --filter=reference='registry/*/*'
docker images --filter=reference='registry/*/*/*'

Format output to get repository:tag

Available: .ID, .Repository, .Tag, .Digest, .CreatedSince, .CreatedAt, Size

docker images --filter=reference='registry/*/*/*' --format "{{.Repository}}:{{.Tag}}"

Push all filtered images

for i in $(docker images --filter=reference='registry/*/*/*' --format "{{.Repository}}:{{.Tag}}"); do docker push $i; done

Find containers folder name

sudo su -
for f in `find /var/lib/docker -name 'config.v2.json'`; do echo $f; cat $f | python -m json.tool | grep '"Name": "/r'; done | grep <application_name>