redhat man page for cksum

cksum(n)							       cksum								  cksum(n)

NAME
       cksum - calculate a cksum(1) compatible checksum

SYNOPSIS
       package require Tcl 8.2

       package require cksum ?1.0?

       ::crc::cksum ?-format format? message

       ::crc::cksum ?-format format? -filename file

DESCRIPTION
       This  package  provides a Tcl-only implementation of the cksum(1) algorithm based upon information provided at in the GNU implementation of
       this program as part of the GNU Textutils 2.0 package.

COMMANDS
       ::crc::cksum ?-format format? message

       ::crc::cksum ?-format format? -filename file
	      The command takes string data or a file name and returns a checksum value calculated using the cksum(1)  algorithm.  The	result	is
	      formatted using the format(n) specifier provided or as an unsigned integer (%u) by default.

OPTIONS
       -filename name
	      Return a checksum for the file contents instead of for parameter data.

       -format string
	      Return the checksum using an alternative format template.

EXAMPLES
       % crc::cksum "Hello, World!"
       2609532967

       % crc::cksum -format 0x%X "Hello, World!"
       0x9B8A5027

       % crc::cksum -file cksum.tcl
       1828321145

SEE ALSO
       sum(n), crc32(n)

AUTHORS
       Pat Thoyts

KEYWORDS
       cksum, checksum, crc, crc32, cyclic redundancy check, data integrity, security

crc									1.0								  cksum(n)