SUM(1)
NAME
sum − print checksum and block count of a file
SYNOPSIS
sum [ −r ] [ file ]
HP-UX COMPATIBILITY
Level: HP-UX/STANDARD
Origin: System V
Remarks: Not supported on the Integral Personal Computer.
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. Stdin is used if no file names are given. Sum 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
DIAGNOSTICS
“Read error” is indistinguishable from end of file on most devices; check the block count.
Hewlett-Packard — last mod. May 11, 2021