Perché dopo l'aggiornamento di installazione di Ubuntu 12.04 non vengono installati?


14

Ho installato Ubuntu 12.04 su un computer. Va tutto bene senza aggiornamento. Subito dopo l'installazione, mostrava circa 200 MB di aggiornamenti da scaricare. Da allora sto cercando di installare tutti gli aggiornamenti. Ora è parzialmente completato, alcuni dei software (firefox, VLC) vengono aggiornati. Sta ancora mostrando 39.3 MB di aggiornamenti da scaricare e fallisce ancora e ancora. Ogni volta che ho provato a installare questi aggiornamenti da 39,3 MB, mostra che non è possibile connettersi a Internet, ma non c'è alcun problema con la mia connessione (l'indicatore di rete mostra che è collegato e posso navigare e scaricare qualsiasi cosa). Mi sta dando il seguente messaggio:

Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-3.2.0-43-generic-pae_3.2.0-43.68_i386.deb Size mismatch
Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-headers-3.2.0-43-generic-pae_3.2.0-43.68_i386.deb Size mismatch

Ho pensato che questo fosse un problema con l'elenco delle fonti. Quindi ho dato il seguente comando

sudo rm -vf /var/lib/apt/lists/partial/*

In precedenza, ho riscontrato un simile tipo di problema con un altro computer. A quel tempo, questa soluzione ha funzionato per me, ma ora sto ancora affrontando questo problema. Qualcuno per favore mi aiuti a risolvere questo problema.

Aggiornare

Ecco l'output di sudo apt-get update

Hit http://dl.google.com stable Release.gpg                                    
Hit http://archive.canonical.com precise Release.gpg                           
Get:1 http://extras.ubuntu.com precise Release.gpg [72 B]                      
Hit http://dl.google.com stable Release                                        
Hit http://us.archive.ubuntu.com precise Release.gpg                           
Hit http://archive.canonical.com precise Release                     
Hit http://dl.google.com stable/main i386 Packages                             
Hit http://extras.ubuntu.com precise Release                                   
Ign http://dl.google.com stable/main TranslationIndex                          
Get:2 http://us.archive.ubuntu.com precise-updates Release.gpg [198 B]
Hit http://archive.canonical.com precise/partner i386 Packages                 
Hit http://extras.ubuntu.com precise/main Sources                              
Hit http://us.archive.ubuntu.com precise-backports Release.gpg                 
Ign http://archive.canonical.com precise/partner TranslationIndex              
Hit http://extras.ubuntu.com precise/main i386 Packages                        
Hit http://us.archive.ubuntu.com precise-security Release.gpg                  
Ign http://extras.ubuntu.com precise/main TranslationIndex                     
Hit http://us.archive.ubuntu.com precise Release                               
Ign http://dl.google.com stable/main Translation-en_US                         
Get:3 http://us.archive.ubuntu.com precise-updates Release [49.6 kB]           
Ign http://dl.google.com stable/main Translation-en                            
Get:4 http://us.archive.ubuntu.com precise-updates Release [49.6 kB]           
Ign http://archive.canonical.com precise/partner Translation-en_US             
Ign http://archive.canonical.com precise/partner Translation-en                
Hit http://us.archive.ubuntu.com precise-backports Release                     
Hit http://us.archive.ubuntu.com precise-security Release                      
Ign http://extras.ubuntu.com precise/main Translation-en_US                    
Hit http://us.archive.ubuntu.com precise/main Sources                          
Ign http://extras.ubuntu.com precise/main Translation-en                       
Hit http://us.archive.ubuntu.com precise/restricted Sources                    
Hit http://us.archive.ubuntu.com precise/universe Sources                      
Hit http://us.archive.ubuntu.com precise/multiverse Sources                    
Hit http://us.archive.ubuntu.com precise/main i386 Packages                    
Hit http://us.archive.ubuntu.com precise/restricted i386 Packages              
Hit http://us.archive.ubuntu.com precise/universe i386 Packages                
Hit http://us.archive.ubuntu.com precise/multiverse i386 Packages              
Hit http://us.archive.ubuntu.com precise/main TranslationIndex                 
Hit http://us.archive.ubuntu.com precise/multiverse TranslationIndex           
Hit http://us.archive.ubuntu.com precise/restricted TranslationIndex
Hit http://us.archive.ubuntu.com precise/universe TranslationIndex
Get:5 http://us.archive.ubuntu.com precise-updates/main Sources [383 kB]
Get:6 http://us.archive.ubuntu.com precise-updates/main Sources [383 kB]       
Get:7 http://us.archive.ubuntu.com precise-updates/restricted Sources [5,467 B]
Get:8 http://us.archive.ubuntu.com precise-updates/universe Sources [87.1 kB]  
Get:9 http://us.archive.ubuntu.com precise-updates/universe Sources [87.1 kB]  
Get:10 http://us.archive.ubuntu.com precise-updates/universe Sources [87.1 kB] 
Get:11 http://us.archive.ubuntu.com precise-updates/multiverse Sources [6,582 B]
Get:12 http://us.archive.ubuntu.com precise-updates/main i386 Packages [625 kB]
Get:13 http://us.archive.ubuntu.com precise-updates/restricted i386 Packages [10.0 kB]
Get:14 http://us.archive.ubuntu.com precise-updates/universe i386 Packages [203 kB]
Get:15 http://us.archive.ubuntu.com precise-updates/multiverse i386 Packages [13.8 kB]
Get:16 http://us.archive.ubuntu.com precise-updates/multiverse i386 Packages [13.8 kB]
100% [16 Packages bzip2 0 B] [Connecting to us.archive.ubuntu.com (91.189.91.14
bzip2: Compressed file ends unexpectedly;
    perhaps it is corrupted?  *Possible* reason follows.
bzip2: Inappropriate ioctl for device
    Input file = (stdin), output file = (stdout)

It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.

You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.

Hit http://us.archive.ubuntu.com precise-updates/main TranslationIndex         
Hit http://us.archive.ubuntu.com precise-updates/multiverse TranslationIndex   
Hit http://us.archive.ubuntu.com precise-updates/restricted TranslationIndex   
Hit http://us.archive.ubuntu.com precise-updates/universe TranslationIndex     
Hit http://us.archive.ubuntu.com precise-backports/main Sources                
Hit http://us.archive.ubuntu.com precise-backports/restricted Sources          
Hit http://us.archive.ubuntu.com precise-backports/universe Sources
Hit http://us.archive.ubuntu.com precise-backports/multiverse Sources
Hit http://us.archive.ubuntu.com precise-backports/main i386 Packages
Hit http://us.archive.ubuntu.com precise-backports/restricted i386 Packages
Hit http://us.archive.ubuntu.com precise-backports/universe i386 Packages
Hit http://us.archive.ubuntu.com precise-backports/multiverse i386 Packages
Hit http://us.archive.ubuntu.com precise-backports/main TranslationIndex
Hit http://us.archive.ubuntu.com precise-backports/multiverse TranslationIndex
Hit http://us.archive.ubuntu.com precise-backports/restricted TranslationIndex
Hit http://us.archive.ubuntu.com precise-backports/universe TranslationIndex
Hit http://us.archive.ubuntu.com precise-security/main Sources
Hit http://us.archive.ubuntu.com precise-security/restricted Sources
Hit http://us.archive.ubuntu.com precise-security/universe Sources
Hit http://us.archive.ubuntu.com precise-security/multiverse Sources
Hit http://us.archive.ubuntu.com precise-security/main i386 Packages
Hit http://us.archive.ubuntu.com precise-security/restricted i386 Packages
Hit http://us.archive.ubuntu.com precise-security/universe i386 Packages
Hit http://us.archive.ubuntu.com precise-security/multiverse i386 Packages
Hit http://us.archive.ubuntu.com precise-security/main TranslationIndex
Hit http://us.archive.ubuntu.com precise-security/multiverse TranslationIndex
Hit http://us.archive.ubuntu.com precise-security/restricted TranslationIndex
Hit http://us.archive.ubuntu.com precise-security/universe TranslationIndex
Hit http://us.archive.ubuntu.com precise/main Translation-en
Hit http://us.archive.ubuntu.com precise/multiverse Translation-en
Hit http://us.archive.ubuntu.com precise/restricted Translation-en
Hit http://us.archive.ubuntu.com precise/universe Translation-en
Hit http://us.archive.ubuntu.com precise-updates/main Translation-en           
Hit http://us.archive.ubuntu.com precise-updates/multiverse Translation-en
Hit http://us.archive.ubuntu.com precise-updates/restricted Translation-en
Hit http://us.archive.ubuntu.com precise-updates/universe Translation-en
Hit http://us.archive.ubuntu.com precise-backports/main Translation-en
Hit http://us.archive.ubuntu.com precise-backports/multiverse Translation-en
Hit http://us.archive.ubuntu.com precise-backports/restricted Translation-en
Hit http://us.archive.ubuntu.com precise-backports/universe Translation-en
Hit http://us.archive.ubuntu.com precise-security/main Translation-en
Hit http://us.archive.ubuntu.com precise-security/multiverse Translation-en
Hit http://us.archive.ubuntu.com precise-security/restricted Translation-en
Hit http://us.archive.ubuntu.com precise-security/universe Translation-en
Fetched 935 kB in 3min 39s (4,261 B/s)
W: Failed to fetch gzip:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise-updates_multiverse_binary-i386_Packages  Hash Sum mismatch

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

Hai provato ad aggiornare le liste? sudo apt-get updatedovrebbe farti gli indici dei pacchetti attuali ...
Piskvor lasciato l'edificio

Se lavori in un'organizzazione, verifica la presenza di un blocco FTP del firewall. Se la porta FTP è bloccata dal firewall, non ti consentirà l'aggiornamento.

Risposte:


15

Il mio problema è ora risolto. Sto postando qui la soluzione passo dopo passo. Dall'output di sudo apt-get update, ho riscontrato il seguente problema:

W: Failed to fetch gzip:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise-updates_multiverse_binary-i386_Packages  Hash Sum mismatch

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

Per risolvere questo problema ho inserito i seguenti comandi uno per uno.

sudo rm /var/lib/apt/lists/* -vf
sudo apt-get clean
sudo apt-get autoremove
sudo apt-get update
sudo apt-get dist-upgrade 

Quindi l'output è stato

audity@auditypc:~$ sudo rm /var/lib/apt/lists/* -vf
[sudo] password for audity: 
removed `/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_partner_binary-i386_Packages'
removed `/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_Release'
removed `/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_precise_Release.gpg'
removed `/var/lib/apt/lists/dl.google.com_linux_talkplugin_deb_dists_stable_main_binary-i386_Packages'
removed `/var/lib/apt/lists/dl.google.com_linux_talkplugin_deb_dists_stable_Release'
removed `/var/lib/apt/lists/dl.google.com_linux_talkplugin_deb_dists_stable_Release.gpg'
removed `/var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages'
removed `/var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_main_source_Sources'
removed `/var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_Release'
removed `/var/lib/apt/lists/extras.ubuntu.com_ubuntu_dists_precise_Release.gpg'
removed `/var/lib/apt/lists/lock'
rm: cannot remove `/var/lib/apt/lists/partial': Is a directory
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_main_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_main_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_main_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_main_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_multiverse_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_multiverse_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_multiverse_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_multiverse_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_Release'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_Release.gpg'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_restricted_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_restricted_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_restricted_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_restricted_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_universe_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_universe_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_universe_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-backports_universe_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_main_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_main_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_main_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_multiverse_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_multiverse_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_multiverse_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_multiverse_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_Release'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_Release.gpg'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_restricted_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_restricted_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_main_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_main_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_main_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_main_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_multiverse_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_multiverse_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_multiverse_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_multiverse_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_Release'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_Release.gpg'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_restricted_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_restricted_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_restricted_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_restricted_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_universe_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_universe_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_universe_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-security_universe_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_main_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_main_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_main_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_main_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_multiverse_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_multiverse_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_multiverse_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_multiverse_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_Release'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_Release.gpg'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_restricted_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_restricted_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_restricted_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_restricted_source_Sources'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_universe_binary-i386_Packages'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_universe_i18n_Index'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_universe_i18n_Translation-en'
removed `/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise-updates_universe_source_Sources'
audity@auditypc:~$ sudo apt-get clean
[sudo] password for audity: 
audity@auditypc:~$ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
audity@auditypc:~$ sudo apt-get update
Get:1 http://dl.google.com stable Release.gpg [198 B]                          
Get:2 http://us.archive.ubuntu.com precise Release.gpg [198 B]                 
Get:3 http://dl.google.com stable Release [1,347 B]                            
Get:4 http://extras.ubuntu.com precise Release.gpg [72 B]                      
Get:5 http://archive.canonical.com precise Release.gpg [198 B]                 
Get:6 http://dl.google.com stable/main i386 Packages [763 B]                   
Get:7 http://us.archive.ubuntu.com precise-updates Release.gpg [198 B]         
Get:8 http://extras.ubuntu.com precise Release [11.9 kB]                       
Ign http://dl.google.com stable/main TranslationIndex                          
Get:9 http://archive.canonical.com precise Release [7,078 B]                   
Get:10 http://extras.ubuntu.com precise/main Sources [8,130 B]                 
Get:11 http://us.archive.ubuntu.com precise-backports Release.gpg [198 B]      
Get:12 http://archive.canonical.com precise/partner i386 Packages [8,261 B]    
Get:13 http://extras.ubuntu.com precise/main i386 Packages [10.8 kB]           
Ign http://archive.canonical.com precise/partner TranslationIndex              
Get:14 http://us.archive.ubuntu.com precise-security Release.gpg [198 B]       
Ign http://extras.ubuntu.com precise/main TranslationIndex                     
Get:15 http://us.archive.ubuntu.com precise Release [49.6 kB]                  
Ign http://dl.google.com stable/main Translation-en_US                         
Get:16 http://us.archive.ubuntu.com precise Release [49.6 kB]                  
Ign http://dl.google.com stable/main Translation-en                            
Get:17 http://us.archive.ubuntu.com precise-updates Release [49.6 kB]          
Ign http://extras.ubuntu.com precise/main Translation-en_US                    
Ign http://archive.canonical.com precise/partner Translation-en_US             
Get:18 http://us.archive.ubuntu.com precise-updates Release [49.6 kB]          
Ign http://extras.ubuntu.com precise/main Translation-en                       
Ign http://archive.canonical.com precise/partner Translation-en                
Get:19 http://us.archive.ubuntu.com precise-backports Release [49.6 kB]        
Get:20 http://us.archive.ubuntu.com precise-backports Release [49.6 kB]        
Get:21 http://us.archive.ubuntu.com precise-backports Release [49.6 kB]        
Ign http://us.archive.ubuntu.com precise-backports Release                     
E: GPG error: http://us.archive.ubuntu.com precise-backports Release: The following signatures were invalid: NODATA 2
audity@auditypc:~$

Ora stavo affrontando un errore GPG. Per risolvere questo ho provato quanto segue

$ sudo -i
# apt-get clean
# cd /var/lib/apt
# mv lists lists.old
# mkdir -p lists/partial
# apt-get clean
# apt-get update
# exit

Dopo questo comando. Ho inserito i comandi finali.

sudo apt-get dist-upgrade

8

Ho appena avuto la mancata corrispondenza della somma degli hash dell'elenco dei pacchetti negli Stati Uniti su alcune nuove installazioni 12.04.5. Soluzione più breve che ha funzionato almeno per me:

# rm /var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_*
# rm /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise*
# aptitude update
... now worked ...
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