sum(1B)

NAME

     sum - calculate a checksum for a file

SYNOPSIS

     /usr/ucb/sum file...

DESCRIPTION

     sum calculates and displays a 16-bit checksum for the  named
     file  and  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.

USAGE

     See largefile(5) for the description of the behavior of  sum
     when encountering files greater than or equal to 2 Gbyte ( 2
    **31 bytes).

ATTRIBUTES

     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWscpu                    |
    |_____________________________|_____________________________|

SEE ALSO

     sum(1), wc(1), attributes(5), largefile(5)

DIAGNOSTICS

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

NOTES

     sum and /usr/bin/sum (see sum(1))  return  different  check-
     sums.

     This utility is obsolete.