phpman > man > sha256sum

Che Dong

⚡ TLDR: sha256sum (tldr-pages)

Calculate SHA256 cryptographic checksums.

Calculate the SHA256 checksum for one or more files
sha256sum {{path/to/file1 path/to/file2 ...}}
Calculate and save the list of SHA256 checksums to a file
sha256sum {{path/to/file1 path/to/file2 ...}} > {{path/to/file.sha256}}
Calculate a SHA256 checksum from `stdin`
{{command}} | sha256sum
Read a file of SHA256 checksums and filenames and verify all files have matching checksums
sha256sum {{-c|--check}} {{path/to/file.sha256}}
Only show a message for missing files or when verification fails
sha256sum {{-c|--check}} --quiet {{path/to/file.sha256}}
Only show a message when verification fails, ignoring missing files
sha256sum --ignore-missing {{-c|--check}} --quiet {{path/to/file.sha256}}
Check a known SHA256 checksum of a file
echo {{known_sha256_checksum_of_the_file}} {{path/to/file}} | sha256sum {{-c|--check}}

SHA256SUM(1) User Commands SHA256SUM(1)

NAME
sha256sum - compute and check SHA256 message digest

SYNOPSIS
sha256sum [OPTION]... [FILE]...

DESCRIPTION
Print or check SHA256 (256-bit) checksums.

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

-b, --binary
read in binary mode

-c, --check
read SHA256 sums from the FILEs and check them

--tag create a BSD-style checksum

-t, --text
read in text mode (default)

-z, --zero
end each output line with NUL, not newline, and disable file name escaping

The following five options are useful only when verifying checksums:
--ignore-missing
don't fail or report status for missing files

--quiet
don't print OK for each successfully verified file

--status
don't output anything, status code shows success

--strict
exit non-zero for improperly formatted checksum lines

-w, --warn
warn about improperly formatted checksum lines

--help display this help and exit

--version
output version information and exit

The sums are computed as described in FIPS-180-2. When checking, the input should be a for‐
mer output of this program. The default mode is to print a line with checksum, a space, a
character indicating input mode ('*' for binary, ' ' for text or where binary is insignifi‐
cant), and name for each FILE.

Note: There is no difference between binary mode and text mode on GNU systems.

AUTHOR
Written by Ulrich Drepper, Scott Miller, and David Madore.

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/sha256sum>
or available locally via: info '(coreutils) sha2 utilities'

GNU coreutils 8.32 January 2026 SHA256SUM(1)

Generated by phpMan v3.0-1-g415f66e Author: Che Dong Under GNU General Public License
2026-06-05 11:07 @216.73.217.105
CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

phpMan > man > sha256sum