SHA256SUMSection: User Commands (1)
Updated: June 2012
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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)
- Note: There is no difference between binary and text mode option on GNU system.
The following three options are useful only when verifying checksums:
- don't print OK for each successfully verified file
- 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 sha256sum bugs to [email protected]
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/>
COPYRIGHTCopyright © 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.
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 coreutils aqsha256sum invocationaq
should give you access to the complete manual.
- REPORTING BUGS
- SEE ALSO
This document was created by man2html, using the manual pages.
Time: 05:29:10 GMT, December 24, 2015