b2sum

Calculate BLAKE2 cryptographic checksums. More information: https://www.gnu.org/software/coreutils/manual/html_node/b2sum-invocation.html.

• Calculate the BLAKE2 checksum for one or more files:

b2sum path/to/file1 path/to/file2 …

• Calculate and save the list of BLAKE2 checksums to a file:

b2sum path/to/file1 path/to/file2 … > path/to/file.b2

• Calculate a BLAKE2 checksum from stdin:

command | b2sum

• Read a file of BLAKE2 checksums and filenames and verify all files have matching checksums:

b2sum --check path/to/file.b2

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

b2sum --check --quiet path/to/file.b2

• Only show a message when verification fails, ignoring missing files:

b2sum --ignore-missing --check --quiet path/to/file.b2

• Check a known BLAKE2 checksum of a file:

echo known_blake2_checksum_of_the_file path/to/file | b2sum --check