sum(1)                                                     sum(1)



     NAME
          sum - calculate a checksum

     SYNOPSIS
          sum [-r] file...

     DESCRIPTION
          sum calculates and displays a 16-bit checksum for the named
          file, and also displays 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 flag op-
          tion -r causes an alternate algorithm to be used in comput-
          ing the checksum.

     EXAMPLES
               sum filea

          produces the checksum and the block count of filea.

     FILES
          /bin/sum

     SEE ALSO
          sumdir(1), wc(1).

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



























     April, 1990                                                     1