The fact that everything looks different doesn't mean that all has changed...
Manually uncompressing backup files creating by BackupPC (Zzzz)
By jeltsch on Thu, 04/05/2007 - 22:22
The perl script /usr/local/backuppc/bin/BackupPC_zcat does it, but you need BackupPC installed for this purpose. There is a standalone frontend for the compression libraries available called Zzzz... made by the same guy who is behind mplayer.