4.3BSD - /usr/man/cat1/sum.0

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 trans‐
       mission 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)