Automated SCP file transfers can be orchestrated in your Flux workflow using SCPAction. This action supports file uploads or downloads using SCP. SCP is basically a remote copy (rcp) through a SSH tunnel. It is easy to setup key-based SSH login for your systems, here is one article describing the steps for Mac. You could also run arbitrary system commands or scripts using this action.
Here is a screen shot showing SCPAction configuration that downloads logs from a linux host.
Here is a screen shot showing SCPAction configuration that executes a remote disk check command for a linux host.
A sample test case that shows how this action could be integrated within a Flux workflow using Java API.
Maven users could just drop this dependency in your POM to use this plugin in your project.
com.fluxcorp.plugins scp-action 1.0.3.SNAPSHOT
Make sure you include this maven repository where the plugin snapshots are deployed.
sonatype-nexus-snapshots sonatype-nexus-snapshots https://oss.sonatype.org/content/repositories/snapshots/