Duplicati is free software and open source. You can use Duplicati for free even for commercial purposes. Source code is licensed under LGPL. Duplicati runs under Windows, Linux, MacOS. It requires .NET 4.5 or Mono.

Modifying the file system tab file is very dangerous. If you don’t know what you’re doing, or one letter is out of place, disaster can strike. That’s why it’s important to make a complete backup BEFORE doing anything within this guide. We also suggest uploading this backup to your Dropbox or Google Drive etc as a fail safe, in case you can’t access the file when you need it (for some reason).

If you have any experience with Rsync, you might know it's amazingly easy to copy your important files to a back-up location. As the simple example below shows, the logic doesn't really change much if you're using an external disk, a remote server running rsyncd, or running rsync over ssh:

Assign the new physical volume to an existing volume group (VG) or create a new volume group.