b2sum
compute and check BLAKE2 message digest
TLDR
Calculate the BLAKE2 checksum for a file
Calculate BLAKE2 checksums for multiple files
Read a file of BLAKE2 sums and filenames and verify all files have matching checksums
Calculate the BLAKE2 checksum from stdin
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)
-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.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
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.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/b2sum> or available locally via: info b2sum invocation
AUTHOR
Written by Padraig Brady and Samuel Neves.