B2SUM(1) General Commands Manual B2SUM(1) NAME b2sum - Print or check the BLAKE2b checksums SYNOPSIS b2sum [OPTIONS] [FILE]... DESCRIPTION Print or check the BLAKE2b checksums OPTIONS -c, --check read checksums from the FILEs and check them -w, --warn warn about improperly formatted checksum lines --status don't output anything, status code shows success --quiet don't print OK for each successfully verified file --ignore-missing don't fail or report status for missing files --strict exit non-zero for improperly formatted checksum lines -l, --length digest length in bits; must not exceed the max size and must be a multiple of 8 for blake2b; must be 224, 256, 384, or 512 for sha2 or sha3 --tag create a BSD style checksum -z, --zero end each output line with NUL, not newline, and disable file name escaping -h, --help Print help -V, --version Print version VERSION v(uutils coreutils) 0.11.0 2026-09-01 B2SUM(1)