sha256sum
(1)compute and check SHA256 message digest
Options
12-b--binaryread in binary mode
-c--checkread checksums from the FILEs and check them
--tagcreate a BSD-style checksum
-t--textread in text mode (default)
-z--zeroend each output line with NUL, not newline, and disable file name escaping
--ignore-missingdon't fail or report status for missing files
--quietdon't print OK for each successfully verified file
--statusdon't output anything, status code shows success
--strictexit non-zero for improperly formatted checksum lines
-w--warnwarn about improperly formatted checksum lines
--helpdisplay this help and exit
--versionoutput version information and exit
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 checksums from the FILEs and check them
- --tag
- create a BSD-style checksum
- -t, --text
- read in text mode (default)
- -z, --zero
- end each output line with NUL, not newline, and disable file name escaping
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.
There is no difference between binary mode and text mode on GNU systems.
AUTHOR
REPORTING BUGS
GNU coreutils online help:
https://www.gnu.org/software/coreutils/
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