sum(1)                  (BSD Compatibility Package)                  sum(1)


   NAME
         sum - calculate a checksum for a file

   SYNOPSIS
         /usr/ucb/sum filename

   DESCRIPTION
         sum calculates and displays a 16-bit checksum for the named file, and
         also displays the size of the file in kilobytes.  It is typically
         used to look for bad spots, or to validate a file communicated over
         some transmission line.  The checksum is calculated by an algorithm
         which may yield different results on machines with 16-bit ints and
         machines with 32-bit ints, so it cannot always be used to validate
         that a file has been transferred between machines with different-
         sized ints.

   SEE ALSO
         wc(1), sum(1) in the User's Reference Manual.

   DIAGNOSTICS
         Read error is indistinguishable from EOF on most devices; check the
         block count.

   NOTES
         Obsolescent.




























   8/91                                                                 Page 1