ERROR: 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 xxxxx….
FIX:
apt-get install debian-archive-keyring
also works for other repositories like multimedia:
apt-get install debian-multimedia-keyring
Taken from: http://amazing-development.com/archives/2006/02/24/fixing-gpg-errors-with-apt-get-for-dummies-like-me/
ERROR: W: GPG error: http://updates.xensource.com etch Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY xxxxx….
FIX:
wget -q http://updates.vmd.citrix.com/XenServer/5.5.0/GPG-KEY -O- | apt-key add -Taken from: http://www.steveglendinning.com/2009/07/15/xensource-updates-apt-repository-missing-gpg-key/