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

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SUM(1)											   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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