sum(1)                   USER COMMANDS                     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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