sum(1) User Commands sum(1)
NAME
sum - checksum and count the blocks in a file
SYNOPSIS
sum [OPTION]... [FILE]...
DESCRIPTION
Print or check BSD (16-bit) checksums. Legacy interface to the cksum
utility.
With no FILE, or when FILE is -, read standard input.
-r use BSD sum algorithm (the default), use 1K blocks
-s, --sysv
use System V sum algorithm, use 512 bytes blocks
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by Kayvan Aghaiepour and David MacKenzie.
REPORTING BUGS
Report bugs to: bug-coreutils@gnu.org
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
General help using GNU software: <https://www.gnu.org/gethelp/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2026 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://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.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/sum>
or available locally via: info '(coreutils) sum invocation'
GNU coreutils 9.10 March 2026 sum(1)
coreutils 9.10 - Generated Thu Apr 2 16:27:50 CDT 2026