cksum - checksum and count the bytes in a file
Print CRC checksum and byte counts of each FILE.
--help display this help and exit
output version information and exit
Written by Q. Frank Xia.
Report cksum bugs to email@example.com
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report cksum translation bugs to <http://translationproject.org/team/>
Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
The full documentation for cksum is maintained as a Texinfo manual. If the info and cksum programs are properly installed at your site, the command
info coreutils 'cksum invocation'
should give you access to the complete manual.