[Hudlug] Debian help, please.

[Googlemail]

How do you add a missing gpg key to the package db?  I have

W: GPG error: http://xnv4.xandros.com etch Release: The following signatures 
couldn't be verified because the public key is not available: NO_PUBKEY 
A3CCB76FA8BCF0C9

Anne
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