On Linux I've done a rsync syncing supposedly everything in /home to /backup. Both of these disk are the same size, but after the sync du -h shows around 50G difference. I want to know what the 50G difference is. What's the best way to check it?
This method assumes that a file that exists at both locations and is the same size (and other relevant attributes of your choice) is identical. You could additionally get file checksums using