sum(1)           (Directory and File Management Utilities)           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 512 byte 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.


































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