Dr Andrew Scott
G7VAV
Senior Lecturer
School of Computing
and Communications
D35 InfoLab21
Lancaster University
Lancaster, LA1 4WA
United Kingdom
School of Computing
and Communications
D35 InfoLab21
Lancaster University
Lancaster, LA1 4WA
United Kingdom
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SHA256SUM
Section: User Commands (1)Updated: September 2011
Index Return to Main Contents
NAME
sha256sum - compute and check SHA256 message digestSYNOPSIS
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)
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
- --strict
- with --check, exit non-zero for any invalid input
- --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.orgGNU 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 © 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.shtml>.This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
The 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 'sha256sum invocation'
should give you access to the complete manual.
Index
for client
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© Andrew Scott 2006 -
2024,
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Andrew Scott