Is there a way to e.g. see the last 5 outputs from a bash-script started with an exec node?
Several.
You can feed the output back (from an exec node) into the msg flow and on to a dashboard component.
Or you can set up a web endpoint using http-in/-out and output from your bash script using curl. I do that with a few scripts that I run from CRON rather than from Node-RED.
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