W: GPG error: http://ftp.uk.debian.org etch Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 9AA38DCD55BE302B
W: There is no public key available for the following key IDs:
9AA38DCD55BE302B
W: You may want to run apt-get update to correct these problems
Solution:
# gpg –recv-keys 9AA38DCD55BE302B
# gpg –export 9AA38DCD55BE302B | apt-key add —
OR
# apt-get install debian-keyring debian-archive-keyring
# apt-key update