B2SUM(1) General Commands Manual B2SUM(1)

b2sum - Print or check the BLAKE2b checksums

b2sum [OPTIONS] [FILE]...

Print or check the BLAKE2b checksums

read checksums from the FILEs and check them
warn about improperly formatted checksum lines
don't output anything, status code shows success
don't print OK for each successfully verified file
don't fail or report status for missing files
exit non-zero for improperly formatted checksum lines
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
create a BSD style checksum
end each output line with NUL, not newline, and disable file name escaping
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v(uutils coreutils) 0.11.0

2026-09-01