SUM(1)                                                     SUM(1)



     NAME
          sum - print checksum and block count of a file

     SYNOPSIS
          sum [ -r ] 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.  The option
          -r causes an alternate algorithm to be used in computing the
          checksum.

     SEE ALSO
          wc(1).

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

     ORIGIN
          AT&T V.3
































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