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.

       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 (C) 2025 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 9.8               September 2025                          SUM(1)