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/>

SEE ALSO

Full documentation at: <http://www.gnu.org/software/coreutils/b2sum>

or available locally via: info '(coreutils) b2sum invocation'

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.