sum(1)
NAME
sum − print checksum and block count for a file
SYNOPSIS
sum [−r] [file...]
AVAILABILITY
SUNWesu
DESCRIPTION
The sum utility 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.
OPTIONS
The following options are supported:
−r Use an alternate (machine-dependent) algorithm in computing the checksum.
OPERANDS
The following operands are supported:
file A path name of a file. If no files are named, the standard input is used.
ENVIRONMENT
See environ(5) for descriptions of the following environment variables that affect the execution of sum: LC_CTYPE, LC_MESSAGES, and NLSPATH.
EXIT STATUS
The following exit values are returned.
0 Successful completion.
>0 An error occurred.
SEE ALSO
DIAGNOSTICS
“Read error” is indistinguishable from end of file on most devices; check the block count.
NOTES
Portable applications should use cksum(1).
SunOS 5.5/SPARC — Last change: 1 Feb 1995