dump 0.4b41-6 (amd64 binary) in ubuntu jaunty

 Dump examines files on a filesystem and determines which files need to be
 backed up. These files are copied to the given disk, tape or other storage
 medium for safe keeping.
 .
 The restore command performs the inverse function of dump. A full backup of
 a file system may be restored and subsequent incremental backups layered on
 top of it. Single files and directory subtrees may be restored from full or
 partial backups.