sum - Man Page

checksum and count the blocks in a file

Examples (TL;DR)


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


Print or check BSD (16-bit) checksums.

With no FILE, or when FILE is -, read standard input.


use BSD sum algorithm (the default), use 1K blocks

-s, ā€‰--sysv

use System V sum algorithm, use 512 bytes blocks


display this help and exit


output version information and exit


Written by Kayvan Aghaiepour and David MacKenzie.

Reporting Bugs

GNU coreutils online help: <>
Report any translation bugs to <>

See Also

Full documentation <>
or available locally via: info '(coreutils) sum invocation'

Referenced By

pmdashping(1), pmlogmv(1), sum(n).

September 2023 GNU coreutils 9.4