I am trying to extract taxids from a file containing NCBI accession IDs; I have about 20,000 accession IDs.
I have tried using this link to help me: 1.) A: NCBI Accession Number to Taxonomy ID
This did not work and I came up with this error message: ERROR in fetch input: Search Backend failed: read request has timed out. peer: 188.8.131.52:7011
2.) I have heard of the file: ftp://ftp.ncbi.nlm.nih.gov/pub/taxonomy/accession2taxid/nucl_gb.accession2taxid.gz. I tried to perform some grep functions but to no avail, and I could not find a script that helps parse thousands of accession IDs.
Would really appreciate if anyone could help.