How to get mongodump --quiet to still report errors?

I'd like to run mongodump so that it only outputs errors (to avoid extraneous logwatch reporting for an automated nightly backup script).

I've tried mongodump --quiet but from a quick test this supressess error messages also (running it at root folder without permission suppresses the "error creating directory" message that I get without --quiet).

How do I get only error output from mongodump?

Here's the error I get when running without --quiet but which I do NOT get with --quiet:


2016-04-17T13:50:26.294-0400 Failed: error dumping metadata: error creating directory for metadata file dump/234-watchdog: mkdir dump: permission denied

MongoDB is running on Ubuntu. I understand why this error is happening. I want errors like this NOT to be suppressed with the --quiet option.

You can do:

output="$(mongodump 2>&1)" || echo -e "$output"

This save both stdout and stderr into output variable, then if the command exit with not 0 exit code, echo the saved output.

StackExchange Database Administrators Q#135578, answer score: 2