SHA256SUM

Section: User Commands (1)
Updated: September 2019
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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 former 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 insignificant), and name for each FILE.

AUTHOR

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

REPORTING BUGS

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report sha256sum translation bugs to <https://translationproject.org/team/>

COPYRIGHT

Copyright © 2018 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.

Index

NAME

SYNOPSIS

DESCRIPTION

The following five options are useful only when verifying checksums:

This document was created by man2html, using the manual pages.
Time: 08:55:14 GMT, December 16, 2021