CRC(1)                 UNIX System V(September 16 1991)                  CRC(1)


NAME
      crc - checksum files

SYNOPSIS
      crc file ...

DESCRIPTION
      For each file, crc calculates and prints a 32-bit CRC, the byte count,
      and the file name.  It is typically used to validate files transferred
      between different systems, and is useful in detecting subtle disk
      corruption.  Crc uses a checksum compatible with the DOS version of crc,
      the 32 bit CRC used by PKZIP version 0.9, as well as the "crc" command in
      ZCOMM and Professional-YAM.

      The 32-bit CRC used is the frame check sequence in ADCCP (ANSI X3.66,
      also known as FIPS PUB 71 and FED-STD-1003, the U.S. versions of CCITT's
      X.25 link-level protocol).

      32 bit CRC code courtesy Gary S. Brown.

BUGS
      Although most unlikely, files with different data may still produce the
      same crc value.

SEE ALSO
      sum(1), wc(1).




























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