tldr/pages/common/b3sum.md

b3sum

Calculate BLAKE3 cryptographic checksums. More information: https://github.com/BLAKE3-team/BLAKE3/tree/master/b3sum.

• Calculate the BLAKE3 checksum for one or more files:

b3sum {{path/to/file1 path/to/file2 ...}}

• Calculate and save the list of BLAKE3 checksums to a file:

b3sum {{path/to/file1 path/to/file2 ...}} > {{path/to/file.b3}}

• Calculate a BLAKE3 checksum from stdin:

{{command}} | b3sum

• Read a file of BLAKE3 sums and filenames and verify all files have matching checksums:

b3sum --check {{path/to/file.b3}}

• Only show a message for missing files or when verification fails:

b3sum --check --quiet {{path/to/file.b3}}