SHA256SUMSection: User Commands (1)
Updated: March 2007
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NAMEsha256sum - compute and check SHA256 message digest
SYNOPSISsha256sum [OPTION] [FILE]...
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)
The following two options are useful only when verifying checksums:
- don't output anything, status code shows success
- -w, --warn
- warn about improperly formatted checksum lines
- display this help and exit
- 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.
AUTHORWritten by Ulrich Drepper, Scott Miller, and David Madore.
REPORTING BUGSReport bugs to <firstname.lastname@example.org>.
COPYRIGHTCopyright © 2007 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law.
SEE ALSOThe full documentation for sha256sum is maintained as a Texinfo manual. If the info and sha256sum programs are properly installed at your site, the command
- info sha256sum
should give you access to the complete manual.
- REPORTING BUGS
- SEE ALSO