-b

read in binary mode

-c

read SHA1 sums from the FILEs and check them

--tag

create a BSD-style checksum

-t

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 about improperly formatted checksum lines

--help

display this help and exit

--version

output version information and exitThe sums are computed as described in FIPS-180-1. When checking, the input should be a former output of thisprogram. 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.BUGSDo not use the SHA-1 algorithm for security related purposes. Instead, use an SHA-2 algorithm, implemented inthe programs sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1), or the BLAKE2 algorithm, implemented inb2sum(1)AUTHORWritten by Ulrich Drepper, Scott Miller, and David Madore.REPORTING BUGSGNU coreutils online help: <http://www.gnu.org/software/coreutils/>Report sha1sum translation bugs to <http://translationproject.org/team/>COPYRIGHTCopyright © 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 per‐mitted by law.