Docker & Podman Basics

Everyday Container Commands

Docker and Podman share almost identical CLIs (alias docker=podman often just works). Podman is daemonless and rootless-friendly.

Command	Action
`docker run -d -p 8080:80 nginx`	Run detached, map port
`docker ps` / `docker ps -a`	Running / all containers
`docker images`	Local images
`docker exec -it <id> bash`	Shell into a container
`docker logs <id>`	Container output
`docker stop` / `rm`	Stop / remove
`docker build -t app .`	Build from a Dockerfile
`docker pull` / `push`	Registry transfer

Dockerfile essentials: FROM, RUN, COPY, WORKDIR, EXPOSE, CMD/ENTRYPOINT.

Exam tip: -p host:container maps ports; -v host:container mounts volumes; -e KEY=val sets env vars; -d detaches; -it gives an interactive TTY.