Грешка при apt-get update ( не може да си валидира ключовете)

W: GPG error: http://ftp.bg.debian.org stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AED4B06F473041FA
W: GPG error: http://security.debian.org stable/updates Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AED4B06F473041FA
W: GPG error: http://http.us.debian.org stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AED4B06F473041FA
W: You may want to run apt-get update to correct these problems

Ето го и решението:

mail:# gpg --keyserver pgpkeys.mit.edu --recv-key AED4B06F473041FA
gpg: requesting key 473041FA from hkp server pgpkeys.mit.edu
gpg: key 473041FA: "Debian Archive Automatic Signing Key (6.0/squeeze) <[email protected]>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1
mail:## gpg -a --export  AED4B06F473041FA | sudo apt-key add --
OK