b3sum - compute and check BLAKE3 hash
b3sum [FLAGS] [OPTIONS] [FILE]...
Print or check BLAKE3 checksums.
With no FILE, or when FILE is -, read standard input.
- -c, --check
- Reads BLAKE3 sums from the [file]s and checks them
- -h, --help
- Prints help information
- --keyed
- Uses the keyed mode. The secret key is read from standard input, and it
must be exactly 32 raw bytes.
- --no-mmap
- Disables memory mapping. Currently this also disables multithreading.
- --no-names
- Omits filenames in the output
- --quiet
- Skips printing OK for each successfully verified file. Must be used with
--check.
- --raw
- Writes raw output bytes to stdout, rather than hex. --no-names is
implied. In this case, only a single input is allowed.
- -V, --version
- Prints version information
- --derive-key
<CONTEXT>
- Uses the key derivation mode, with the given context string. Cannot be
used with --keyed.
- -l, --length
<LEN>
- The number of output bytes, prior to hex encoding (default 32)
- --num-threads
<NUM>
- The maximum number of threads to use. By default, this is the number of
logical cores. If this flag is omitted, or if its value is 0,
RAYON_NUM_THREADS is also respected.
- <FILE>...
- Files to hash, or checkfiles to check. When no file is given, or when - is
given, read standard input.