docker images

See which images are on your machine, download one with docker pull, pick a version by its tag, and clean up with docker rmi.

>_ Try it: a simulated Linux, right herenothing runs on your computer

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Examples

docker pull redis the latest redis
docker pull redis:7 a specific version, by its tag
docker images everything on this machine
docker images redis only the redis images
docker rmi redis:7 delete the one you don't need
docker images -q just the IDs

How it works

An image is the read-only template a container starts from (nginx, postgres, your own app). docker images lists the ones on your machine, with their tag (version) and size.

docker pull NAME:TAG downloads one from Docker Hub; without a tag you get latest. docker run pulls by itself when the image is missing.

Syntax

docker images [-q] [REPOSITORY[:TAG]]

Options

Option	What it does
`REPOSITORY[:TAG]`	only that image (and tag)
`-q`	only the image IDs
`docker pull`	download an image
`docker rmi`	delete an image

Good to know

Pin versions in real projects (postgres:16, not postgres): latest changes under your feet.
An image used by a container (even a stopped one) can't be removed: docker rm the container first.