I want to use Kraken2 to annotate my unmapped reads but I need to use the nt database from NCBI. The nt database comes in so many parts and I've only seen one command on kraken2 which is:
kraken2-build --standard -db $DBname
Where I would replace $DBname with the full ftp path to the databases. But the nt databases in the ftp server is split into so many parts. So do I have to run this command for like 40+ instances of the nt database? Is there a way for kraken2 to access the nt database all at once and stitch it together? I am having no luck figuring this part out. Thank you for your help.