sum

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

Checksum and count the blocks in a file. With no FILE, or when FILE is -, read standard input.

Options

--help, -h

Print help information

--version, -V

Print version information

-r

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

--sysv, -s

use System V sum algorithm, use 512 bytes blocks