SHA256SUM(1)

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

--tag
    create a BSD-style checksum

-t, --text
    read in text mode (default)

  The following five options are useful only when verifying checksums:

--ignore-missing
    don't fail or report status for missing files

--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 space, a character indicating input mode ('*' for binary, ' ' for text or where binary is insignificant), and name for each FILE.

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

REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report sha256sum translation bugs to <http://translationproject.org/team/>

COPYRIGHT
Copyright © 2017 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
Full documentation at: <http://www.gnu.org/software/coreutils/sha256sum>
or available locally via: info '(coreutils) sha2 utilities'