What is the correct syntax to use Execute program on Linux?

Hi there,

I currently have a CRON trigger that executes a script on a daily base on my server, but I want to be able to do the same from within Rapidminer on demand.

As far as I understand the Execute Command operator should allow me to do that, but as nothing seems to happen (also no errors thrown) I am not sure I use it correctly.

My command is a curl command that loads a json file to my elastic search environment. Running this as a standard bash or sh file works fine, all my data is loaded to elastic, but running the same command in the operator just does nothing. I get a green tick indicating the process ran fine, but no data is transfered.

My curl command is as follows :

curl -s -H "Content-Type: application/x-ndjson" -XPOST http://localhost:9200/_bulk --data-binary "@mydata.json"

And this is my process :

<?xml version="1.0" encoding="UTF-8"?><process version="7.6.001">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="7.6.001" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="productivity:execute_program" compatibility="7.6.001" expanded="true" height="103" name="Execute Program" width="90" x="112" y="34">
        <parameter key="command" value="curl -s -H &quot;Content-Type: application/x-ndjson&quot; -XPOST http://localhost:9200/_bulk --data-binary &quot;@mydata.json&quot;"/>
        <parameter key="working_directory" value="/data/elastic/imports"/>
        <list key="env_variables"/>
      </operator>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
    </process>
  </operator>
</process>

Any idea if I am using it correctly?

or other tips?