Hi Tapan,
If you are trying to download a file using curl on a remote node, you need to enter the correct curl command as a Command step, and set Dispatch to Node to true, and enter the Node filters for your job to target the remote node. If you are targeting a single node, use the node name in the Name filter.
If you are having trouble with this, you should explain the problems you are having in more detail. Paste the error or log output. I'm not sure what part is not working for you.
thanks
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Greg Schueler