To set up, we need to create a file named .ncbirc to store the configuration information. For example, if we keep the blast-2.2.15 directory under the home directory, and that directory does have a db subdirectory, we can specify the path to both data and db directory the following way:
[NCBI]
DATA=~/blast-2.2.15/data
[BLAST]
BLASTDB=~/blast-2.2.15/db
This .ncbirc file should be kept in the home directory. We recommend the use of absolute path if the blast directory is placed somewhere else other than the home directory.