Hi to all, I have the following error message when trying to update my system.
Code:
superman@Aspire-5730:~$ sudo apt-get update
Ign http://dl.google.com stable InRelease
Scaricamento di:1 http://dl.google.com stable Release.gpg [198 B]
Scaricamento di:2 http://dl.google.com stable Release
Ign http://archive.ubuntu.com precise InRelease
Ign http://archive.ubuntu.com precise-updates InRelease
Ign http://archive.ubuntu.com precise-backports InRelease
Ign http://archive.ubuntu.com precise-security InRelease
Ign http://archive.canonical.com precise InRelease
Ign http://extras.ubuntu.com precise InRelease
Scaricamento di:3 http://dl.google.com stable/main i386 Packages [464 B]
Ign http://ppa.launchpad.net precise InRelease
Ign http://ppa.launchpad.net precise InRelease
Ign http://ppa.launchpad.net precise InRelease
Ign http://dl.google.com stable/main TranslationIndex
Trovato http://archive.ubuntu.com precise Release.gpg
Trovato http://archive.ubuntu.com precise-updates Release.gpg
Trovato http://archive.ubuntu.com precise-backports Release.gpg
Scaricamento di:4 http://extras.ubuntu.com precise Release.gpg [72 B]
Scaricamento di:5 http://archive.canonical.com precise Release.gpg [198 B]
Ign http://ppa.launchpad.net precise InRelease
Ign http://ppa.launchpad.net precise InRelease
Scaricamento di:6 http://ppa.launchpad.net precise Release.gpg [316 B]
Scaricamento di:7 http://ppa.launchpad.net precise Release.gpg [316 B]
Trovato http://archive.ubuntu.com precise-security Release.gpg
Trovato http://archive.ubuntu.com precise Release
Trovato http://archive.ubuntu.com precise-updates Release
Trovato http://extras.ubuntu.com precise Release
Err http://extras.ubuntu.com precise Release
Trovato http://archive.canonical.com precise Release
Ign http://archive.canonical.com precise Release
Trovato http://archive.ubuntu.com precise-backports Release
Trovato http://ppa.launchpad.net precise Release.gpg
Trovato http://ppa.launchpad.net precise Release.gpg
Trovato http://archive.ubuntu.com precise-security Release
Trovato http://archive.ubuntu.com precise/main Sources
Trovato http://archive.ubuntu.com precise/restricted Sources
Trovato http://archive.ubuntu.com precise/universe Sources
Trovato http://archive.ubuntu.com precise/multiverse Sources
Trovato http://archive.ubuntu.com precise/main i386 Packages
Ign http://archive.canonical.com precise/partner i386 Packages/DiffIndex
Trovato http://archive.ubuntu.com precise/restricted i386 Packages
Trovato http://archive.ubuntu.com precise/universe i386 Packages
Trovato http://archive.ubuntu.com precise/multiverse i386 Packages
Trovato http://archive.ubuntu.com precise/main TranslationIndex
Trovato http://archive.ubuntu.com precise/multiverse TranslationIndex
Trovato http://archive.ubuntu.com precise/restricted TranslationIndex
Trovato http://archive.ubuntu.com precise/universe TranslationIndex
Trovato http://archive.ubuntu.com precise-updates/main Sources
Trovato http://archive.ubuntu.com precise-updates/restricted Sources
Ign http://archive.canonical.com precise/partner TranslationIndex
Trovato http://archive.ubuntu.com precise-updates/universe Sources
Trovato http://archive.ubuntu.com precise-updates/multiverse Sources
Trovato http://archive.ubuntu.com precise-updates/main i386 Packages
Trovato http://archive.ubuntu.com precise-updates/restricted i386 Packages
Trovato http://archive.ubuntu.com precise-updates/universe i386 Packages
Trovato http://archive.ubuntu.com precise-updates/multiverse i386 Packages
Trovato http://archive.ubuntu.com precise-updates/main TranslationIndex
Trovato http://archive.ubuntu.com precise-updates/multiverse TranslationIndex
Trovato http://archive.ubuntu.com precise-updates/restricted TranslationIndex
Trovato http://archive.ubuntu.com precise-updates/universe TranslationIndex
Trovato http://archive.ubuntu.com precise-backports/main Sources
Trovato http://archive.ubuntu.com precise-backports/restricted Sources
Trovato http://archive.ubuntu.com precise-backports/universe Sources
Trovato http://archive.ubuntu.com precise-backports/multiverse Sources
Trovato http://archive.ubuntu.com precise-backports/main i386 Packages
Ign http://dl.google.com stable/main Translation-it_IT
Ign http://dl.google.com stable/main Translation-it
Ign http://dl.google.com stable/main Translation-en
Trovato http://archive.ubuntu.com precise-backports/restricted i386 Packages
Trovato http://archive.ubuntu.com precise-backports/universe i386 Packages
Trovato http://archive.ubuntu.com precise-backports/multiverse i386 Packages
Trovato http://archive.ubuntu.com precise-backports/main TranslationIndex
Trovato http://archive.ubuntu.com precise-backports/multiverse TranslationIndex
Trovato http://archive.ubuntu.com precise-backports/restricted TranslationIndex
Trovato http://archive.ubuntu.com precise-backports/universe TranslationIndex
Trovato http://archive.ubuntu.com precise-security/main Sources
Trovato http://archive.ubuntu.com precise-security/restricted Sources
Trovato http://archive.ubuntu.com precise-security/universe Sources
Trovato http://archive.ubuntu.com precise-security/multiverse Sources
Trovato http://archive.ubuntu.com precise-security/main i386 Packages
Trovato http://archive.ubuntu.com precise-security/restricted i386 Packages
Trovato http://archive.ubuntu.com precise-security/universe i386 Packages
Trovato http://archive.ubuntu.com precise-security/multiverse i386 Packages
Trovato http://ppa.launchpad.net precise Release.gpg
Trovato http://ppa.launchpad.net precise Release
Ign http://ppa.launchpad.net precise Release
Trovato http://archive.canonical.com precise/partner i386 Packages
Trovato http://archive.ubuntu.com precise-security/main TranslationIndex
Trovato http://archive.ubuntu.com precise-security/multiverse TranslationIndex
Trovato http://archive.ubuntu.com precise-security/restricted TranslationIndex
Trovato http://archive.ubuntu.com precise-security/universe TranslationIndex
Trovato http://archive.ubuntu.com precise/main Translation-it
Trovato http://archive.ubuntu.com precise/main Translation-en
Trovato http://ppa.launchpad.net precise Release
Trovato http://ppa.launchpad.net precise Release
Ign http://ppa.launchpad.net precise Release
Trovato http://archive.ubuntu.com precise/multiverse Translation-it
Trovato http://archive.ubuntu.com precise/multiverse Translation-en
Trovato http://archive.ubuntu.com precise/restricted Translation-it
Trovato http://archive.ubuntu.com precise/restricted Translation-en
Trovato http://archive.ubuntu.com precise/universe Translation-it
Trovato http://archive.ubuntu.com precise/universe Translation-en
Trovato http://archive.ubuntu.com precise-updates/main Translation-it
Trovato http://archive.ubuntu.com precise-updates/main Translation-en
Trovato http://archive.ubuntu.com precise-updates/multiverse Translation-it
Trovato http://ppa.launchpad.net precise Release
Trovato http://ppa.launchpad.net precise Release
Trovato http://archive.ubuntu.com precise-updates/multiverse Translation-en
Trovato http://archive.ubuntu.com precise-updates/restricted Translation-it
Trovato http://archive.ubuntu.com precise-updates/restricted Translation-en
Trovato http://archive.ubuntu.com precise-updates/universe Translation-it
Trovato http://archive.ubuntu.com precise-updates/universe Translation-en
Trovato http://archive.ubuntu.com precise-backports/main Translation-en
Ign http://ppa.launchpad.net precise/main Sources/DiffIndex
Trovato http://archive.ubuntu.com precise-backports/multiverse Translation-en
Trovato http://archive.ubuntu.com precise-backports/restricted Translation-en
Trovato http://archive.ubuntu.com precise-backports/universe Translation-en
Trovato http://archive.ubuntu.com precise-security/main Translation-en
Ign http://ppa.launchpad.net precise/main i386 Packages/DiffIndex
Ign http://ppa.launchpad.net precise/main TranslationIndex
Ign http://ppa.launchpad.net precise/main Sources/DiffIndex
Ign http://ppa.launchpad.net precise/main i386 Packages/DiffIndex
Ign http://ppa.launchpad.net precise/main TranslationIndex
Trovato http://ppa.launchpad.net precise/main Sources
Trovato http://ppa.launchpad.net precise/main i386 Packages
Trovato http://archive.ubuntu.com precise-security/multiverse Translation-en
Trovato http://archive.ubuntu.com precise-security/restricted Translation-en
Trovato http://archive.ubuntu.com precise-security/universe Translation-en
Ign http://ppa.launchpad.net precise/main TranslationIndex
Trovato http://ppa.launchpad.net precise/main Sources
Trovato http://ppa.launchpad.net precise/main i386 Packages
Ign http://ppa.launchpad.net precise/main TranslationIndex
Trovato http://ppa.launchpad.net precise/main Sources
Trovato http://ppa.launchpad.net precise/main i386 Packages
Ign http://ppa.launchpad.net precise/main TranslationIndex
Trovato http://ppa.launchpad.net precise/main Sources
Trovato http://ppa.launchpad.net precise/main i386 Packages
Trovato http://ppa.launchpad.net precise/main Sources
Trovato http://ppa.launchpad.net precise/main i386 Packages
Ign http://archive.canonical.com precise/partner Translation-it_IT
Ign http://archive.canonical.com precise/partner Translation-it
Ign http://archive.canonical.com precise/partner Translation-en
Ign http://ppa.launchpad.net precise/main Translation-it_IT
Ign http://ppa.launchpad.net precise/main Translation-it
Ign http://ppa.launchpad.net precise/main Translation-en
Ign http://ppa.launchpad.net precise/main Translation-it_IT
Ign http://ppa.launchpad.net precise/main Translation-it
Ign http://ppa.launchpad.net precise/main Translation-en
Ign http://ppa.launchpad.net precise/main Translation-it_IT
Ign http://ppa.launchpad.net precise/main Translation-it
Ign http://ppa.launchpad.net precise/main Translation-en
Ign http://ppa.launchpad.net precise/main Translation-it_IT
Ign http://ppa.launchpad.net precise/main Translation-it
Ign http://ppa.launchpad.net precise/main Translation-en
Ign http://ppa.launchpad.net precise/main Translation-it_IT
Ign http://ppa.launchpad.net precise/main Translation-it
Ign http://ppa.launchpad.net precise/main Translation-en
Recuperati 2902 B in 10s (283 B/s)
Lettura elenco dei pacchetti... Fatto
W: Si è verificato un errore nel verificare la firma. Il repository non è aggiornato e verranno usati i file indice precedenti. Errore GPG: http://extras.ubuntu.com precise Release: Le seguenti firme non erano valide: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: Errore GPG: http://archive.canonical.com precise Release: Le seguenti firme non erano valide: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: Errore GPG: http://ppa.launchpad.net precise Release: Le seguenti firme non erano valide: BADSIG 5C92FC592AE51AB5 Launchpad PPA for consindo
W: Errore GPG: http://ppa.launchpad.net precise Release: Le seguenti firme non erano valide: BADSIG A8AA1FAA3F055C03 Launchpad PPA for Daniel Richter
W: Impossibile recuperare http://extras.ubuntu.com/ubuntu/dists/precise/Release
W: Impossibile scaricare alcuni file di indice: saranno ignorati o verranno usati quelli vecchi.
What can I do?
thanks.
Regards.
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