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)
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.
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.