B2SUM(1) General Commands Manual B2SUM(1)

# [NAME](#NAME)

b2sum - Print or check the BLAKE2b checksums

# [SYNOPSIS](#SYNOPSIS)

**b2sum** \[OPTIONS] \[FILE]...

# [DESCRIPTION](#DESCRIPTION)

Print or check the BLAKE2b checksums

# [OPTIONS](#OPTIONS)

[**-c**, **--check**](#c)

read checksums from the FILEs and check them

[**-w**, **--warn**](#w)

warn about improperly formatted checksum lines

[**--status**](#status)

don't output anything, status code shows success

[**--quiet**](#quiet)

don't print OK for each successfully verified file

[**--ignore-missing**](#ignore)

don't fail or report status for missing files

[**--strict**](#strict)

exit non-zero for improperly formatted checksum lines

[**-l**, **--length**](#l)

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**](#tag)

create a BSD style checksum

[**-z**, **--zero**](#z)

end each output line with NUL, not newline, and disable file name escaping

[**-h**, **--help**](#h)

Print help

[**-V**, **--version**](#V)

Print version

# [VERSION](#VERSION)

v(uutils coreutils) 0.12.0

2026-10-29

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Document: b2sum(1) from uutils 0.12.0-r5 (Chainguard OS)
Source: https://github.com/uutils/coreutils