SUM(1) SUM(1) (NAME) sum - (SYNOPSIS) sum []... []... (DESCRIPTION) BSD ( ). - . -r sum BSD ( ) 1K -s, --sysv sum System V --help --version (AUTHOR) Kayvan Aghaiepour David MacKenzie. (REPORTING BUGS) GNU coreutils: : (COPYRIGHT) (C) 2022 Free Software Foundation, Inc. GPLv3+: GPL . : . . (SEE ALSO) : info '(coreutils) sum invocation' GNU coreutils 9.1 SUM(1)