sha256sum (1)

sha256sum [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

--tag

create a BSD-style checksum

-t, --text

read in text mode (default)

The following four 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

--strict

exit non-zero for improperly formatted checksum lines

-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 input mode ('*' for binary, space for text), and name for each FILE.

Written by Ulrich Drepper, Scott Miller, and David Madore.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>

Report sha256sum translation bugs to <http://translationproject.org/team/>

Copyright © 2014 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.

Full documentation at: <http://www.gnu.org/software/coreutils/sha256sum>

or available locally via: info '(coreutils) sha2 utilities'