AWS CLI - All Commands Return Unknown Output Type: [None]


Answer :

$aws configure press Enters see the "Default output format [None]:"  input one of "json, text or table "(all in lower case)  after that rerun your command.

My ~/.aws/config was somehow in a bad state, there were multiple declarations for the same setting under a single role header. Editing the file manually fixed my issue.

The info under Configuration Settings and Precedence https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html led me to the right place.


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