Usage: kraken2 [options] <filename(s)>
Options:
--db NAME Name for Kraken 2 DB
(default: none)
--threads NUM Number of threads (default: 1)
--quick Quick operation (use first hit or hits)
--unclassified-out FILENAME
Print unclassified sequences to filename
--classified-out FILENAME
Print classified sequences to filename
--output FILENAME Print output to filename (default: stdout); "-" will
suppress normal output
--confidence FLOAT Confidence score threshold (default: 0.0); must be
in [0, 1].
--minimum-base-quality NUM
Minimum base quality used in classification (def: 0,
only effective with FASTQ input).
--report FILENAME Print a report with aggregrate counts/clade to file
--use-mpa-style With --report, format report output like Kraken 1's
kraken-mpa-report
--report-zero-counts With --report, report counts for ALL taxa, even if
counts are zero
--memory-mapping Avoids loading database into RAM
--paired The filenames provided have paired-end reads
--use-names Print scientific names instead of just taxids
--gzip-compressed Input files are compressed with gzip
--bzip2-compressed Input files are compressed with bzip2
--help Print this message
--version Print version information
If none of the *-compressed flags are specified, and the filename provided
is a regular file, automatic format detection is attempted.