SHA256SUM

Section: User Commands (1)
Updated: March 2015
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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 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.  

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 © 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.  

SEE ALSO

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
The following four options are useful only when verifying checksums:
AUTHOR
REPORTING BUGS
COPYRIGHT
SEE ALSO