David Adam's recommendation is for backup up desktops to the server.

I think you're looking for backing up the server itself. In this case, if you don't like any of the solutions in the Marketplace (eg. Remote Backup, Bare Metal Backup etc.), know that you are not confined to what ClearOS has in the Marketplace.

Being binary compatible with CentOS/RHEL has it's advantages...huge advantages. Any software (and howto) you can find is almost certainly translatable to ClearOS - as long as the software can be run in 'headless' mode.

One great example in the backup space I've used with success is SpiderOAK One, especially with their 'LAN Sync' feature.

Could be just what you're looking for. Runs headless just fine, and you can use the SpiderOAK One client for any PC (Windows, Mac, Linux) to configure, backup, restore (one or all) from any device you have.

Though I sound like it, I am not affiliated with SpiderOAK.

There are a tonne of options for backup in the CentOS/Linux world...from something as simple as rsync and bash scripting to AFFA and on up to the Enterprise level, like Bacula.

Ben