b2sum
(1)compute and check BLAKE2 message digest
Options
13-b--binaryread in binary mode
-c--checkread checksums from the FILEs and check them
-l--lengthBITSdigest length in bits; must not exceed the max for the blake2 algorithm and must be a multiple of 8
--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 BLAKE2b (512-bit) checksums.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
- -b, --binary
- read in binary mode
- -c, --check
- read checksums from the FILEs and check them
- -l, --length=BITS
- digest length in bits; must not exceed the max for the blake2 algorithm and must be a multiple of 8
- --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 RFC 7693. 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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