SHA256SUM

Section: User Commands (1)
Updated: June 2012
Index Return to Main Contents

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
-t, --text: read in text mode (default)
: Note: There is no difference between binary and text mode option on GNU system.

The following three options are useful only when verifying checksums:

--quiet: don't print OK for each successfully verified file
--status: don't output anything, status code shows success
-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 character indicating type (`*' for binary, ` ' for text), and name for each FILE.

AUTHOR

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

REPORTING BUGS

Report sha256sum bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report sha256sum translation bugs to <http://translationproject.org/team/>

COPYRIGHT

Copyright © 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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 three options are useful only when verifying checksums:

This document was created by man2html, using the manual pages.
Time: 05:29:10 GMT, December 24, 2015