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, g

Answer 1

In your Windows shell, you can do:

FOR /f "tokens=*" %i IN ('docker ps -q') DO docker stop %i

Taken from other question: Stop all docker containers at once on Windows

Answer 2

You can also run your command - docker stop $(docker ps -aq) in PowerShell or GitBash; I would think it is because the $(docker ps -aq) part of the command is Linux command.