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. 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: Report any translation bugs to COPYRIGHT Copyright (C) 2024 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later . This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO cksum(1) Full documentation or available locally via: info '(coreutils) b2sum invocation' GNU coreutils 9.5 August 2024 B2SUM(1)