man > sum(1)

Che Dong

⚡ TLDR: sum (tldr-pages)

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}}

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

COPYRIGHT
       Copyright  ©  2023 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 9.4                           January 2026                                      SUM(1)

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