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B2SUM(1) User Commands B2SUM(1)

b2sum - compute and check BLAKE2 message digest

b2sum [OPTION]... [FILE]...

Print or check BLAKE2 (512-bit) checksums.

With no FILE, or when FILE is -, read standard input.

-b, --binary
read in binary mode
-c, --check
read BLAKE2 sums from the FILEs and check them
-l, --length
digest length in bits; must not exceed the maximum 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

--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.

Written by Padraig Brady and Samuel Neves.

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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Copyright © 2019 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 <https://www.gnu.org/software/coreutils/b2sum>
or available locally via: info '(coreutils) b2sum invocation'
October 2019 GNU coreutils 8.31