sha256sum(1) - Linux man page

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)
Note: There is no difference between binary and text mode option on GNU system.

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.