Lucid Lynx here..! I can't update my system, neither by Update Manager, nor by command line as root. This is what i got:
Reading package lists... Done
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://deb.opera.com
stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A2019EA84E7532C8
W: Failed to fetch http://deb.opera.com/opera/dists/stable/Release
W: Some index files failed to download, they have been ignored, or old ones used instead.
NOW, a pal told me to write this code and i want to check with you guys if it's right:
gpg --keyserver keyserver.ubuntu.com --recv A2019EA84E7532C8
gpg --armor --export A2019EA84E7532C8 --output A2019EA84E7532C8 | sudo apt-key add -
Thanks for reading this..!