Probleem ID kaardi tarkvara allalaadmisel ubuntu 12.04

Tere,

Palun abi, proovisin toimetada selle õpetuse järgi, mis id.ee leheküljel, kuid iga kord ebaõnnestus. Proovisin ka enne kõik kustutada, aga äkki läks siis seal midagi viltu.

W: There is no public key available for the following key IDs:

1397BC53640DB551

W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4DF9B28CA252A784

W: Failed to fetch https://installer.id.ee/media/ubuntu/dists/precise/main/binary-amd64/Packages

W: Failed to fetch https://installer.id.ee/media/ubuntu/dists/precise/main/binary-i386/Packages

W: Failed to fetch http://ppa.launchpad.net/webupd8team/jupiter/ubuntu/dists/precise/main/source/Sources 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/webupd8team/jupiter/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/webupd8team/jupiter/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.