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

SUM(1)					       General Commands Manual					       SUM(1)

NAME
sum - sum and count blocks in a file
SYNOPSIS
sum file
DESCRIPTION
Sum calculates and prints a 16-bit checksum for the named file, and also prints the number of blocks in the file. It is typically used to look for bad spots, or to validate a file communicated over some transmission line.
SEE ALSO
wc(1)
DIAGNOSTICS
`Read error' is indistinguishable from end of file on most devices; check the block count. 7th Edition April 29, 1985 SUM(1)


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