B2SUM(1) User Commands B2SUM(1)

NAME
b2sum - compute and check BLAKE2 message digest

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

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.

Note: There is no difference between binary mode and text mode on GNU systems.

AUTHOR
Written by Padraig Brady and Samuel Neves.

REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
Copyright © 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/li‐
censes/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.