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sum(1B)		   SunOS/BSD Compatibility Package Commands	       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 trans‐
       mission 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 attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      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 checksums.

       This utility is obsolete.

SunOS 5.10			  8 Nov 1995			       sum(1B)

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