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B2SUM

Section: User Commands (1)
Updated: September 2017
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NAME

b2sum - compute and check BLAKE2 message digest

SYNOPSIS

b2sum [,OPTION/]... [,FILE/]...

DESCRIPTION

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)

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.

AUTHOR

Written by Padraig Brady and Samuel Neves.

REPORTING BUGS

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report b2sum translation bugs to <http://translationproject.org/team/>

COPYRIGHT

Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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.

Index

NAME

SYNOPSIS

DESCRIPTION

The following five options are useful only when verifying checksums: