SUM(C)                   XENIX System V                    SUM(C)



     Name
          sum - Calculates checksum and counts blocks in a file.

     Syntax
          sum [ -r ] file

     Description
          sum calculates and prints a 16-bit checksum for the named
          file, and also prints the number of BSIZE blocks in the
          file.  It is typically used to look for bad spots, or to
          validate a file communicated over a transmission line.  The
          option -r causes an alternate algorithm to be used in
          computing the checksum.

     See Also
          cmchk(C), machine(M), wc(C)

     Diagnostics
          ``Read error'' is indistinguishable from end-of-file on most
          devices; check the block count.

     Notes
          Refer to machine(M) or use the cmchk (C) utility to
          determine BSIZE for your system.































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