Docker unknown shorthand flag: 'a' in -aq)

Question

I have multiple docker (version 18.09.0, build 4d60db4) containers running and I wish to stop them all at once. This blog post shows concisely exactly how to achieve this, great!

I can list all containers using docker ps -aq and have no issues.

However, when trying to stop all containers using the output of docker ps -aq, i.e. docker stop $(docker ps -aq), I receive the following error:

unknown shorthand flag: 'a' in -aq)

EDIT: I'm running Windows 10 Version 10.0.17134.407 in a standard (elevated) command prompt.

Can anyone shed any insight into this?

Thanks.

Answer 1

You can also run your command - docker stop $(docker ps -aq) in PowerShell or Git Bash; I would think the command fails because the $(docker ps -aq) part of the command is Linux command and windows CMD does not know how to translate that.