/var/lib/docker/

docker info | grep Dir

/var/lib/
/var/lib/docker/builder/
/var/lib/docker/buildkit/
/var/lib/docker/containers/
/var/lib/docker/image/
/var/lib/docker/network/
/var/lib/docker/overlay2/
/var/lib/docker/plugins/
/var/lib/docker/runtimes/
/var/lib/docker/swarm/
/var/lib/docker/tmp/
/var/lib/docker/trust/
/var/lib/docker/volumes/

/var/lib/docker/containers/[hash_of_the_container]/hostconfig.json 

Configured in: /etc/docker/daemon.json

Related terms

• docker system df
• docker info
• /bin/truncate -s 0 /var/lib/docker/containers/*/*-json.log

See also

• Docker: docker-compose, Docker Desktop, Docker Scout, Docker Swarm, Docker Volumes, Docker images management, docker network, docker inspect, docker volume inspect, Dockerfile, Docker Engine release notes,docker kill, moby, Docker-in-Docker, docker context, buildx, docker tag, docker system prune, Docker Hub, hub-tool, /etc/docker/daemon.json, hostconfig.json, dockerd, logs, Docker logging, Backup, docker service, depends on, --dns, --filter, --mount, docker login, docker build, apt remove docker.io, .dockerignore, docker context ls | docker-machine, .docker/, PWD, $HOME/.docker/config.json, Docker ID, --env-file, docker --help

https://stackoverflow.com/questions/19335444/how-do-i-assign-a-port-mapping-to-an-existing-docker-container?rq=1