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)
Note: There is no difference between binary and text mode option
on GNU system.
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.
GNU coreutils online help:
Report sha256sum translation bugs to
AUTHOR
Written by Ulrich Drepper, Scott Miller, and David Madore.
COPYRIGHT
Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later .
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.
GNU coreutils 8.22 October 2018 SHA256SUM(1)