apt-get gpg error

При попытке выполнить apt-get update получаем:

W: GPG error: http://ftp.de.debian.org etch Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9AA38DCD55BE302B
W: GPG error: http://ftp.de.debian.org etch/updates Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9AA38DCD55BE302B
W: You may want to run apt-get update to correct these problems

следует выполнить следующие операции:

megaserver:~# gpg --keyserver subkeys.pgp.net --recv 9AA38DCD55BE302B
gpg: directory `/root/.gnupg' created
gpg: can't open `/gnupg/options.skel': No such file or directory
gpg: keyring `/root/.gnupg/secring.gpg' created
gpg: keyring `/root/.gnupg/pubring.gpg' created
gpg: requesting key 55BE302B from hkp server subkeys.pgp.net
gpg: /root/.gnupg/trustdb.gpg: trustdb created
gpg: key 55BE302B: public key "Debian Archive Automatic Signing Key (5.0/lenny) " imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
megaserver:~# gpg --export --armor 9AA38DCD55BE302B | apt-key add -
OK