Incollo il risultato del comando da shell: sudo apt-get update
sergio@sergio:~$ sudo apt-get update
[sudo] password for sergio:
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http://it.archive.ubuntu.com lucid Release.gpg
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http://ppa.launchpad.net lucid Release.gpg
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http://ppa.launchpad.net/tualatrix/ppa/ubuntu/ lucid/main Translation-it
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http://it.archive.ubuntu.com/ubuntu/ lucid/main Translation-it
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http://archive.canonical.com lucid Release.gpg
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http://archive.canonical.com/ubuntu/ lucid/partner Translation-it
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http://ppa.launchpad.net lucid Release
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http://packages.medibuntu.org lucid Release.gpg
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http://packages.medibuntu.org/ lucid/free Translation-it
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http://archive.canonical.com lucid Release
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http://it.archive.ubuntu.com/ubuntu/ lucid/restricted Translation-it
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http://packages.medibuntu.org/ lucid/non-free Translation-it
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http://packages.medibuntu.org lucid Release
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http://download.skype.com stable Release.gpg
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http://ppa.launchpad.net lucid/main Packages
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http://it.archive.ubuntu.com/ubuntu/ lucid/universe Translation-it
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http://archive.canonical.com lucid/partner Packages
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http://packages.medibuntu.org lucid/free Packages
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http://www.geekconnection.org karmic/ Release.gpg
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http://www.geekconnection.org/remastersys/repository/ karmic/ Translation-it
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http://archive.canonical.com lucid/partner Sources
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http://it.archive.ubuntu.com/ubuntu/ lucid/multiverse Translation-it
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http://packages.medibuntu.org lucid/non-free Packages
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http://download.skype.com/linux/repos/debian/ stable/non-free Translation-it
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http://it.archive.ubuntu.com lucid-updates Release.gpg
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http://download.virtualbox.org karmic Release.gpg [197B]
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http://it.archive.ubuntu.com/ubuntu/ lucid-updates/main Translation-it
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http://www.geekconnection.org karmic/ Release
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http://download.skype.com stable Release
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http://it.archive.ubuntu.com/ubuntu/ lucid-updates/restricted Translation-it
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http://it.archive.ubuntu.com/ubuntu/ lucid-updates/universe Translation-it
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http://download.virtualbox.org/virtualbox/debian/ karmic/non-free Translation-it
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http://www.geekconnection.org karmic/ Packages
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http://download.skype.com stable/non-free Packages
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http://it.archive.ubuntu.com/ubuntu/ lucid-updates/multiverse Translation-it
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http://it.archive.ubuntu.com lucid-backports Release.gpg
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http://download.virtualbox.org karmic Release [3446B]
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http://download.virtualbox.org karmic Release
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http://it.archive.ubuntu.com/ubuntu/ lucid-backports/main Translation-it
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http://www.geekconnection.org karmic/ Packages
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http://it.archive.ubuntu.com/ubuntu/ lucid-backports/restricted Translation-it
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http://it.archive.ubuntu.com/ubuntu/ lucid-backports/universe Translation-it
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http://it.archive.ubuntu.com/ubuntu/ lucid-backports/multiverse Translation-it
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http://www.geekconnection.org karmic/ Packages
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http://it.archive.ubuntu.com lucid-security Release.gpg
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http://it.archive.ubuntu.com/ubuntu/ lucid-security/main Translation-it
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http://it.archive.ubuntu.com/ubuntu/ lucid-security/restricted Translation-it
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http://it.archive.ubuntu.com/ubuntu/ lucid-security/universe Translation-it
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http://it.archive.ubuntu.com/ubuntu/ lucid-security/multiverse Translation-it
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http://it.archive.ubuntu.com lucid Release
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http://it.archive.ubuntu.com lucid-updates Release
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http://it.archive.ubuntu.com lucid-backports Release
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http://it.archive.ubuntu.com lucid-security Release
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http://it.archive.ubuntu.com lucid/main Packages
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http://it.archive.ubuntu.com lucid/restricted Packages
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http://it.archive.ubuntu.com lucid/main Sources
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http://it.archive.ubuntu.com lucid/restricted Sources
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http://it.archive.ubuntu.com lucid/universe Packages
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http://it.archive.ubuntu.com lucid/universe Sources
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http://it.archive.ubuntu.com lucid/multiverse Packages
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http://it.archive.ubuntu.com lucid/multiverse Sources
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http://it.archive.ubuntu.com lucid-updates/main Packages
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http://it.archive.ubuntu.com lucid-updates/restricted Packages
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http://it.archive.ubuntu.com lucid-updates/main Sources
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http://it.archive.ubuntu.com lucid-updates/restricted Sources
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http://it.archive.ubuntu.com lucid-updates/universe Packages
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http://it.archive.ubuntu.com lucid-updates/universe Sources
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http://it.archive.ubuntu.com lucid-updates/multiverse Packages
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http://it.archive.ubuntu.com lucid-updates/multiverse Sources
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http://it.archive.ubuntu.com lucid-backports/main Packages
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http://it.archive.ubuntu.com lucid-backports/restricted Packages
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http://it.archive.ubuntu.com lucid-backports/universe Packages
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http://it.archive.ubuntu.com lucid-backports/multiverse Packages
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http://it.archive.ubuntu.com lucid-backports/main Sources
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http://it.archive.ubuntu.com lucid-backports/restricted Sources
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http://it.archive.ubuntu.com lucid-backports/universe Sources
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http://it.archive.ubuntu.com lucid-backports/multiverse Sources
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http://it.archive.ubuntu.com lucid-security/main Packages
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http://it.archive.ubuntu.com lucid-security/restricted Packages
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http://it.archive.ubuntu.com lucid-security/main Sources
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http://it.archive.ubuntu.com lucid-security/restricted Sources
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http://it.archive.ubuntu.com lucid-security/universe Packages
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http://it.archive.ubuntu.com lucid-security/universe Sources
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http://it.archive.ubuntu.com lucid-security/multiverse Packages
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http://it.archive.ubuntu.com lucid-security/multiverse Sources
Recuperati 198B in 5s (36B/s)
Lettura elenco dei pacchetti... Fatto
W: Si è verificato un errore durante la verifica della firma. Il repository non è aggiornato e verrà usato il file precedente degli indici. Errore GPG:
http://download.virtualbox.org karmic Release: Le seguenti firme non sono state verificate perché la chiave pubblica non è disponibile: NO_PUBKEY 54422A4B98AB5139
W: Impossibile recuperare
http://download.virtualbox.org/virtualb ... lease
W: Impossibile scaricare alcuni file di indice: saranno ignorati o verranno usati quelli vecchi.
sergio@sergio:~$
C'è qualcosa che non va. :-\
Partimage lo vorrei usare da un cd autoavviante che contiene diverse utilità simili; va bene lo stesso?
Grazie
Sergio