--userns option is not documented for "docker run" command

[SteffenSH]

Is this a docs issue?

• [X] My issue is about the documentation content or website

Type of issue

Information is incorrect

Description

Documentation for docker run option --userns only say: User namespace to use, which is an ambiguous, confusing and maybe incorrect statement.

See also this comment in issue #7071. And this comment in #7071.

Location

https://docs.docker.com/reference/cli/docker/container/run/

Suggestion

1. Check source code to verify that the only valid value for the docker run --userns option is host (--userns=host).
2. Update the text in the documentation.
3. Also add a reference to this page in the documentation.