[Ubuntu-BR] 12.04 Problemas na atualização

[Marcus]

Bom dia, pessoal.

De uns dias para cá, tenho encontrado esse problema para atualizar o 
ubuntu 12.04.  A mensagem que aparece é essa:

W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/quantal-getdeb/Release.gpg Unable 
to connect to archive.getdeb.net:http:
, W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/precise-getdeb/Release.gpg Unable 
to connect to archive.getdeb.net:http:
, W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/quantal-getdeb/apps/binary-i386/Packages 
Unable to connect to archive.getdeb.net:http:
, W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/quantal-getdeb/apps/i18n/Translation-en 
Unable to connect to archive.getdeb.net:http:
, W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/quantal-getdeb/apps/i18n/Translation-pt 
Unable to connect to archive.getdeb.net:http:
, W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/precise-getdeb/games/binary-i386/Packages 
Unable to connect to archive.getdeb.net:http:
, W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/precise-getdeb/games/i18n/Translation-en 
Unable to connect to archive.getdeb.net:http:
, W:Failed to fetch 
http://archive.getdeb.net/ubuntu/dists/precise-getdeb/games/i18n/Translation-pt 
Unable to connect to archive.getdeb.net:http:
, E:Some index files failed to download. They have been ignored, or old 
ones used instead.


Como devo proceder?

Desde já, muito obrigado pela ajuda, e um bom natal para todos.


Marcus.