SUM(1)

✨ SUM(1) ✨

okay bestie, welcome to the sum manual page 💖 this is the User Commands corner of the man pages, and honestly? she's a legacy icon.

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🌸 NAME 🌸

sum — checksum and count the blocks in a file

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🎀 SYNOPSIS 🎀

sum [OPTION]... [FILE]...

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💅 DESCRIPTION 💅

So basically, sum prints or checks BSD (16-bit) checksums 🦋. She's a legacy interface to the cksum utility — like, an OG, still showing up to the group chat.

When you don't give her any FILE, or when FILE is literally just -, she reads standard input. iconic behaviour tbh.

• -r — use the BSD sum algorithm (she's the default, no cap), and use 1K blocks
• -s, --sysv — use the System V sum algorithm, and use 512 bytes blocks
• --help — display this help and exit 🫶
• --version — output version information and exit ✨

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👑 AUTHOR 👑

Written by Kayvan Aghaiepour and David MacKenzie. absolute legends fr fr 💜

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😭 REPORTING BUGS 😭

found a bug? pls tell the right people, not me:

• 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/

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🦋 SEE ALSO 🦋

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

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Packaged by Ubuntu (9.10-1ubuntu2). 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.

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okay that's the whole page, you ate that 💅 this was GNU coreutils 9.10, dated August 2026, and she lives at the corner of SUM(1). periodt 🎀✨