# phpman > man > sum(1)

> **TLDR:** Compute checksums and the number of blocks for a file.
>
- Compute a checksum with BSD-compatible algorithm and 1024-byte blocks:
  `sum {{path/to/file}}`
- Compute a checksum with System V-compatible algorithm and 512-byte blocks:
  `sum {{-s|--sysv}} {{path/to/file}}`

*Source: tldr-pages*

---

[SUM(1)](https://www.chedong.com/phpMan.php/man/SUM/1/markdown)                                      User Commands                                     [SUM(1)](https://www.chedong.com/phpMan.php/man/SUM/1/markdown)



## NAME
       sum - checksum and count the blocks in a file

## SYNOPSIS
       **sum** [_OPTION_]... [_FILE_]...

## DESCRIPTION
       Print checksum and block counts for each FILE.

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

### -r

### -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
       GNU coreutils online help: <<https://www.gnu.org/software/coreutils/>>
       Report any translation bugs to <<https://translationproject.org/team/>>

## COPYRIGHT
       Copyright  ©  2020 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 8.32                          January 2026                                      [SUM(1)](https://www.chedong.com/phpMan.php/man/SUM/1/markdown)