b3sum
Command line utility for calculating BLAKE3 hashes.
TLDR
Calculate the BLAKE3 checksum for a file
$ b3sum [path/to/file]
Calculate BLAKE3 checksums for multiple files
$ b3sum [path/to/file1] [path/to/file2]
Calculate the BLAKE3 checksum from stdin
$ [some_command] | b3sum
Create a file of BLAKE3 checksums
$ b3sum [path/to/file] > [path/to/file.b3]
Read and verify a file of BLAKE3 checksums
$ b3sum --check [path/to/file.b3]