pulumi config set --secret --path sat-key.yellow "$(cat sat_key.pub)

An error occurred: bad flag syntax: -----BEGIN PUBLIC KEY----

You likely want to pass this value in via

stdin

so that the shell doesn't try and parse it. See https://www.pulumi.com/docs/reference/cli/pulumi_config_set/:

If a value is not present on the command line, pulumi will prompt for the value. Multi-line values may be set by piping a file to standard in.

@white-balloon-205 will check that. Thanks