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BSD 2.11 - man page for crc (bsd section 1)

CRC(1)					       General Commands Manual					       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 corrup- tion. 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 (high reliability communications programs). 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 extremely unlikely, files with different data may still produce the same crc value.
SEE ALSO
chek(1), undos(OMEN), todos(OMEN), tocpm(OMEN), sum(1), wc(1). OMEN CRC(1)


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