Use PAR files to reconstruct missing parts of multi-part archives

 This utility applies the data-recovery capability concepts of RAID-like
 systems to the posting and downloading of multi-part archives on USENET by
 providing the ability to create and use redundant recovery records. It
 supports the 'Reed-Soloman Code' implementation that allows for recovery of
 any 'X' volumes for 'X' parity volumes present. It is popularly used on
 USENET postings, but is not limited to this use.
 .
 The Debian parchive package supports "legacy" version 1.0 PAR files.
 The Debian par2 package supports version 2.0 PAR files.
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 Upstream source: http://parchive.sourceforge.net/