SUM(1)                               BSD                                SUM(1)



NAME
     sum - sum and count blocks in a file

SYNOPSIS
     sum file

DESCRIPTION
     sum calculates and prints a 16-bit checksum for the named file. It also
     prints the number of blocks in the file. sum is typically used to look
     for bad spots in a file, or to validate a file communicated over a
     transmission line.

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

SEE ALSO
     wc(1)