SHA256SUM(1) User Commands SHA256SUM(1)
sha256sum - compute and check SHA256 message digest
sha256sum [OPTION]... [FILE]...
Print or check SHA256 (256-bit) checksums.
With no FILE, or when FILE is -, read standard input.
read in binary mode
read SHA256 sums from the FILEs and check them
--tag create a BSD-style checksum
read in text mode (default)
end each output line with NUL, not newline, and disable file
The following five options are useful only when verifying checksums:
don't fail or report status for missing files
don't print OK for each successfully verified file
don't output anything, status code shows success
exit non-zero for improperly formatted checksum lines
warn about improperly formatted checksum lines
--help display this help and exit
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.
Written by Ulrich Drepper, Scott Miller, and David Madore.
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report sha256sum translation bugs to <https://translationpro-
Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://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: <https://www.gnu.org/software/core-
or available locally via: info '(coreutils) sha2 utilities'
GNU coreutils 8.30 August 2018 SHA256SUM(1)