whichdb searches all available EMBOSS databases for sequences with a specified ID name or accession number.

Here is a sample session with whichdb:

% whichdb
Search all databases for an entry
ID or Accession number: hsfau
Output file [outfile.whichdb]:

Mandatory qualifiers (bold if not always prompted):

[-entry] (string)

ID or accession number.

-outfile (outfile)

Output filename.

Advanced qualifiers:

-get (boolean)

Retrieve sequences.