B2SUM(1) General Commands Manual B2SUM(1) (NAME) b2sum - BLAKE2b (SYNOPSIS) b2sum [OPTIONS] [FILE]... (DESCRIPTION) BLAKE2b. (OPTIONS) -c, --check FILE -w, --warn --status --quiet OK --ignore-missing --strict -l, --length (digest) blake2b sha2 sha3 --tag BSD -z, --zero NUL (escaping) -h, --help -V, --version (VERSION) v(uutils coreutils) 0.11.0 2026-09-01 B2SUM(1)