Indexed NCBI nt database - without unclassified environmental sequences

Indexed NCBI nucleotide database that excludes environmental (unclassified) sequences, ready-to-use with KMA and CCMetagen.The database can be downloaded directly form the command line with:curl "https://mediaflux.researchsoftware.unimelb.edu.au:443/mflux/share.mfjp?_token=ko6MbZXl7FWjAS3jsItV1128247851&browser=true&filename=ncbi_nt_no_env_11jun2019.zip" -d browser=false -o ncbi_nt_no_env_11jun2019.zip