Docker run not working it says requires at least 1 argument

Question

I'm learning docker, and trying to run the existing images. The first command is working fine

command 1: docker run --name static-site -e AUTHOR="Mathi1" -d -P dockersamples/static-site

But the below command is throwing error

Command 2: docker run --name mvcdotnet -e AUTHOR="Mathi2" -d -p valkyrion/mvcdotnet

Error:

"docker run" requires at least 1 argument.

See 'docker run --help'.

Usage: docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

Run a command in a new container

By the way valkyrion/mvcdotnet is not my repository, and docker run -d valkyrion/mvcdotnet is wrking fine — Mathiyazhagan, Mar 07 '19 at 10:21

score 1 · Accepted Answer · answered Mar 07 '19 at 10:29

According to docker help run:

…
-p, --publish list                   Publish a container's port(s) to the host
-P, --publish-all                    Publish all exposed ports to random ports
…

Command 1 uses -P (short form of --publish-all) and after that the image name. -P has no arguments. Command 2 uses -p (short form of --publish list). -p expects an argument and I think docker mistakes the image name as the argument for -p (and expects an image name after that).

Thanks for the help stefan. It was a case sensitive issue. I should have used caps "P". Its working fine now — Mathiyazhagan, Mar 07 '19 at 10:47

Docker run not working it says requires at least 1 argument

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