sum

PURPOSE

     Displays the checksum and block count of a file.

SYNOPSIS
     sum [ -r ] file


DESCRIPTION

     The  sum  command  reads  file and  calculates  a  16-bit
     checksum for  the file  and the number  of blocks  in the
     file.  The checksum  and number of blocks  are written to
     standard output.   The sum  command is generally  used to
     determine if a file that  has been copied or communicated
     over transmission lines is an exact copy of the original.

FLAG

     -r Uses an  alternate algorithm  to compute  the checksum
        (rigorous  byte-by-byte  computation rather  than  the
        default word by word computation).

EXAMPLE

     To display the  checksum of, and the number  of blocks in
     "datafile":

       sum  datafile

     If the checksum  of "datafile" is "1605" and  if the file
     contains "3" blocks, then sum displays:

       1605 3 datafile

RELATED INFORMATION

     The following command:  "wc."