Just toying with a clustered server farm for fun (as you do) and experimenting with Webmin and its 'clustered' modules.
It has a feature that can copy files from one server to another on a repeating basis. Does this feature/module use cron jobs and what protocol does it use to copy the files?
I have searched all about the net and yet I cannot find any decent documentation on webmin or its features. Is it just poorly documented or am I missing something?