Man1 - sum.1

sum - checksum and count the blocks in a file

sum [/OPTION/]… [/FILE/]…

Print or check BSD (16-bit) checksums.

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

Written by Kayvan Aghaiepour and David MacKenzie.

GNU coreutils online help: https://www.gnu.org/software/coreutils/
Report any translation bugs to https://translationproject.org/team/

Copyright © 2021 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.

Full documentation https://www.gnu.org/software/coreutils/sum
or available locally via: info ’(coreutils) sum invocation’