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sha256sum — compute and check SHA256 message digest
sha256sum [OPTION...] [FILE...]
Print or check SHA256 (256−bit) checksums. With no FILE, or when FILE is −, read standard input.
−b, −−binaryread in binary mode
−c, −−checkread SHA256 sums from the FILEs and check them
−−tagcreate a BSD−style checksum
−t, −−textread in text mode (default)
−−quietdon't print OK for each successfully verified file
−−statusdon't output anything, status code shows success
−w, −−warnwarn about improperly formatted checksum lines
−−strictwith −−check, exit
non−zero for any invalid input
−−helpdisplay this help and exit
−−versionoutput 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 input mode ('*' for binary, space for text), and name for each FILE.
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/>
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.
| COPYRIGHT |
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Copyright © 2013 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. |