coreutils: b2sum invocation
6.4 ‘b2sum’: Print or check BLAKE2 digests
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‘b2sum’ computes a 512-bit checksum for each specified FILE. The same
usage and options as the ‘md5sum’ command are supported. ⇒md5sum
invocation. In addition ‘b2sum’ supports the following options.
‘-l’
‘--length’
Change (shorten) the default digest length. This is specified in
bits and thus must be a multiple of 8. This option is ignored when
‘--check’ is specified, as the length is automatically determined
when checking.