If you are moving from an old Synology to a new Synology NAS, or just want to keep two NAS in sync at all times, the simple-yet-effective solution I’ve found is to use Shared Folder Sync with rsync.

You can run a series of Linux commands to copy multiple files to a folder or copy a single file to multiple folders, but you can save time and trouble by using xargs, loops and scripts. Using a series ...