Problemas con los repositorios

Segui los pasos presentados en : https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure
y esta fue la respuesta en terminal:

gabriel@gabriel-UL30A:~$ sudo grep -R proxy /etc/apt/*
[sudo] password for gabriel:
gabriel@gabriel-UL30A:~$ sudo fuser -vvv /var/lib/dpkg/lock
gabriel@gabriel-UL30A:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"
gabriel@gabriel-UL30A:~$ uname -a
Linux gabriel-UL30A 3.2.0-27-generic-pae #43-Ubuntu SMP Fri Jul 6 15:06:05 UTC 2012 i686 i686 i386 GNU/Linux
gabriel@gabriel-UL30A:~$ sudo rm /var/lib/apt/lists/lock
gabriel@gabriel-UL30A:~$ sudo cp -arf /var/lib/dpkg /var/lib/dpkg.backup
gabriel@gabriel-UL30A:~$ sudo mv /var/lib/dpkg/status /var/lib/dpkg/status-bad
gabriel@gabriel-UL30A:~$ sudo cp /var/lib/dpkg/status-old /var/lib/dpkg/status
gabriel@gabriel-UL30A:~$ sudo mv /var/lib/dpkg/available /var/lib/dpkg/available-bad
gabriel@gabriel-UL30A:~$ sudo cp /var/lib/dpkg/available-old /var/lib/dpkg/available
gabriel@gabriel-UL30A:~$ sudo rm -rf /var/lib/dpkg/updates/*
gabriel@gabriel-UL30A:~$ sudo rm -rf /var/lib/apt/lists
gabriel@gabriel-UL30A:~$ sudo rm /var/cache/apt/*.bin
gabriel@gabriel-UL30A:~$ sudo mkdir /var/lib/apt/lists
gabriel@gabriel-UL30A:~$ sudo mkdir /var/lib/apt/lists/partial
gabriel@gabriel-UL30A:~$ LANG=C;sudo apt-get clean
gabriel@gabriel-UL30A:~$ LANG=C;sudo apt-get autoclean
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias
Leyendo la información de estado... Hecho
gabriel@gabriel-UL30A:~$ LANG=C;sudo apt-get --purge autoremove
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias
Leyendo la información de estado... Hecho
Los siguientes paquetes se ELIMINARÁN:
  calligra-l10n-engb* calligra-l10n-es*
0 actualizados, 0 se instalarán, 2 para eliminar y 0 no actualizados.
4 no instalados del todo o eliminados.
Se liberarán 3517 kB después de esta operación.
¿Desea continuar [S/n]?
(Leyendo la base de datos ... 353086 ficheros o directorios instalados actualmente.)
Desinstalando calligra-l10n-engb ...
Desinstalando calligra-l10n-es ...
Configurando abrowser (14.0.1+build1-0ubuntu0.12.04.1) ...
Configurando abrowser-branding (14.0.1+build1-0ubuntu0.12.04.1) ...
Configurando acct (6.5.5-1ubuntu1) ...
Turning on process accounting, file set to '/var/log/account/pacct'.
 * Done.
Configurando advancecomp (1.15-1) ...
gabriel@gabriel-UL30A:~$ LANG=C;sudo apt-get update -o APT::Cache-Limit=25165824Ign http://archive.ubuntu.com precise InRelease
Ign http://archive.ubuntu.com precise-updates InRelease
Ign http://archive.ubuntu.com precise-security InRelease
Ign http://archive.canonical.com precise InRelease
Ign http://extras.ubuntu.com precise InRelease
Des:1 http://archive.ubuntu.com precise Release.gpg [198 B]
Des:2 http://archive.ubuntu.com precise-updates Release.gpg [198 B]
Des:3 http://archive.canonical.com precise Release.gpg [198 B]
Des:4 http://extras.ubuntu.com precise Release.gpg [72 B]
Des:5 http://archive.ubuntu.com precise-security Release.gpg [198 B]
Des:6 http://archive.canonical.com precise Release [7078 B]
Des:7 http://extras.ubuntu.com precise Release [11.9 kB]
Des:8 http://archive.ubuntu.com precise Release [49.6 kB]
Des:9 http://archive.canonical.com precise/partner Sources [3428 B]
Des:10 http://archive.canonical.com precise/partner i386 Packages [5043 B]
Ign http://archive.canonical.com precise/partner TranslationIndex
Des:11 http://archive.ubuntu.com precise-updates Release [49.6 kB]
Des:12 http://extras.ubuntu.com precise/main Sources [2053 B]
Des:13 http://extras.ubuntu.com precise/main i386 Packages [2258 B]
Ign http://extras.ubuntu.com precise/main TranslationIndex
Des:14 http://archive.ubuntu.com precise-security Release [49.6 kB]
Des:15 http://archive.ubuntu.com precise/main Sources [934 kB]
Ign http://archive.canonical.com precise/partner Translation-es_AR
Ign http://archive.canonical.com precise/partner Translation-es
Ign http://extras.ubuntu.com precise/main Translation-es_AR
Ign http://archive.canonical.com precise/partner Translation-en
Ign http://extras.ubuntu.com precise/main Translation-es
Ign http://extras.ubuntu.com precise/main Translation-en
Des:16 http://archive.ubuntu.com precise/restricted Sources [5470 B]
Des:17 http://archive.ubuntu.com precise/universe Sources [5019 kB]
Des:18 http://archive.ubuntu.com precise/multiverse Sources [155 kB]
Des:19 http://archive.ubuntu.com precise/main i386 Packages [1274 kB]
Des:20 http://archive.ubuntu.com precise/restricted i386 Packages [8431 B]
Des:21 http://archive.ubuntu.com precise/universe i386 Packages [4796 kB]
Des:22 http://archive.ubuntu.com precise/multiverse i386 Packages [121 kB]
Des:23 http://archive.ubuntu.com precise/main TranslationIndex [3706 B]
Des:24 http://archive.ubuntu.com precise/multiverse TranslationIndex [2676 B]
Des:25 http://archive.ubuntu.com precise/restricted TranslationIndex [2596 B]
Des:26 http://archive.ubuntu.com precise/universe TranslationIndex [2922 B]
Des:27 http://archive.ubuntu.com precise-updates/main Sources [144 kB]
Des:28 http://archive.ubuntu.com precise-updates/restricted Sources [2073 B]
Des:29 http://archive.ubuntu.com precise-updates/universe Sources [45.8 kB]
Des:30 http://archive.ubuntu.com precise-updates/multiverse Sources [1058 B]
Des:31 http://archive.ubuntu.com precise-updates/main i386 Packages [349 kB]
Des:32 http://archive.ubuntu.com precise-updates/restricted i386 Packages [3949 B]
Des:33 http://archive.ubuntu.com precise-updates/universe i386 Packages [117 kB]
Des:34 http://archive.ubuntu.com precise-updates/multiverse i386 Packages [2540 B]
Des:35 http://archive.ubuntu.com precise-updates/main TranslationIndex [3564 B]
Des:36 http://archive.ubuntu.com precise-updates/multiverse TranslationIndex [2605 B]
Des:37 http://archive.ubuntu.com precise-updates/restricted TranslationIndex [2461 B]
Des:38 http://archive.ubuntu.com precise-updates/universe TranslationIndex [2850 B]
Des:39 http://archive.ubuntu.com precise-security/main Sources [34.0 kB]
Des:40 http://archive.ubuntu.com precise-security/restricted Sources [14 B]
Des:41 http://archive.ubuntu.com precise-security/universe Sources [10.2 kB]
Des:42 http://archive.ubuntu.com precise-security/multiverse Sources [713 B]
Des:43 http://archive.ubuntu.com precise-security/main i386 Packages [125 kB]
Des:44 http://archive.ubuntu.com precise-security/restricted i386 Packages [14 B]
Des:45 http://archive.ubuntu.com precise-security/universe i386 Packages [33.2 kB]
Des:46 http://archive.ubuntu.com precise-security/multiverse i386 Packages [1394 B]
Des:47 http://archive.ubuntu.com precise-security/main TranslationIndex [73 B]
Des:48 http://archive.ubuntu.com precise-security/multiverse TranslationIndex [71 B]
Des:49 http://archive.ubuntu.com precise-security/restricted TranslationIndex [70 B]
Des:50 http://archive.ubuntu.com precise-security/universe TranslationIndex [73 B]
Des:51 http://archive.ubuntu.com precise/main Translation-es [652 kB]
Des:52 http://archive.ubuntu.com precise/main Translation-en [726 kB]
Des:53 http://archive.ubuntu.com precise/multiverse Translation-es [101 kB]
Des:54 http://archive.ubuntu.com precise/multiverse Translation-en [93.4 kB]
Des:55 http://archive.ubuntu.com precise/restricted Translation-es [2691 B]
Des:56 http://archive.ubuntu.com precise/restricted Translation-en [2395 B]
Des:57 http://archive.ubuntu.com precise/universe Translation-es [1284 kB]
Des:58 http://archive.ubuntu.com precise/universe Translation-en [3341 kB]
Des:59 http://archive.ubuntu.com precise-updates/main Translation-es [652 kB]
Des:60 http://archive.ubuntu.com precise-updates/main Translation-en [165 kB]
Des:61 http://archive.ubuntu.com precise-updates/multiverse Translation-es [101 kB]
Des:62 http://archive.ubuntu.com precise-updates/multiverse Translation-en [1600 B]
Des:63 http://archive.ubuntu.com precise-updates/restricted Translation-es [2691 B]
Des:64 http://archive.ubuntu.com precise-updates/restricted Translation-en [1083 B]
Des:65 http://archive.ubuntu.com precise-updates/universe Translation-es [1284 kB]
Des:66 http://archive.ubuntu.com precise-updates/universe Translation-en [70.5 kB]
Des:67 http://archive.ubuntu.com precise-security/main Translation-en [61.6 kB]
Des:68 http://archive.ubuntu.com precise-security/multiverse Translation-en [587 B]
Des:69 http://archive.ubuntu.com precise-security/restricted Translation-en [14 B]
Des:70 http://archive.ubuntu.com precise-security/universe Translation-en [21.5 kB]
Descargados 21.9 MB en 1min. 26seg. (253 kB/s)
Leyendo lista de paquetes... Hecho
gabriel@gabriel-UL30A:~$ sudo dpkg --configure -a
gabriel@gabriel-UL30A:~$ sudo dpkg --clear-avail
gabriel@gabriel-UL30A:~$ LANG=C;sudo apt-get -f install
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias
Leyendo la información de estado... Hecho
0 actualizados, 0 se instalarán, 0 para eliminar y 0 no actualizados.
gabriel@gabriel-UL30A:~$ LANG=C;sudo apt-get --fix-missing install
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias
Leyendo la información de estado... Hecho
0 actualizados, 0 se instalarán, 0 para eliminar y 0 no actualizados.
gabriel@gabriel-UL30A:~$ LANG=C;sudo apt-get update -o APT::Cache-Limit=25165824 && sudo apt-get dist-upgrade
Ign http://archive.ubuntu.com precise InRelease
Ign http://archive.ubuntu.com precise-updates InRelease
Ign http://archive.ubuntu.com precise-security InRelease
Ign http://extras.ubuntu.com precise InRelease
Ign http://archive.canonical.com precise InRelease
Obj http://archive.ubuntu.com precise Release.gpg
Obj http://extras.ubuntu.com precise Release.gpg
Obj http://archive.canonical.com precise Release.gpg
Obj http://archive.ubuntu.com precise-updates Release.gpg
Obj http://extras.ubuntu.com precise Release
Obj http://archive.canonical.com precise Release
Obj http://archive.ubuntu.com precise-security Release.gpg
Obj http://extras.ubuntu.com precise/main Sources
Obj http://archive.canonical.com precise/partner Sources
Obj http://archive.ubuntu.com precise Release
Obj http://extras.ubuntu.com precise/main i386 Packages
Ign http://extras.ubuntu.com precise/main TranslationIndex
Obj http://archive.canonical.com precise/partner i386 Packages
Ign http://archive.canonical.com precise/partner TranslationIndex
Obj http://archive.ubuntu.com precise-updates Release
Obj http://archive.ubuntu.com precise-security Release
Obj http://archive.ubuntu.com precise/main Sources
Obj http://archive.ubuntu.com precise/restricted Sources
Obj http://archive.ubuntu.com precise/universe Sources
Obj http://archive.ubuntu.com precise/multiverse Sources
Obj http://archive.ubuntu.com precise/main i386 Packages
Obj http://archive.ubuntu.com precise/restricted i386 Packages
Obj http://archive.ubuntu.com precise/universe i386 Packages
Obj http://archive.ubuntu.com precise/multiverse i386 Packages
Obj http://archive.ubuntu.com precise/main TranslationIndex
Obj http://archive.ubuntu.com precise/multiverse TranslationIndex
Obj http://archive.ubuntu.com precise/restricted TranslationIndex
Obj http://archive.ubuntu.com precise/universe TranslationIndex
Obj http://archive.ubuntu.com precise-updates/main Sources
Obj http://archive.ubuntu.com precise-updates/restricted Sources
Obj http://archive.ubuntu.com precise-updates/universe Sources
Obj http://archive.ubuntu.com precise-updates/multiverse Sources
Obj http://archive.ubuntu.com precise-updates/main i386 Packages
Obj http://archive.ubuntu.com precise-updates/restricted i386 Packages
Obj http://archive.ubuntu.com precise-updates/universe i386 Packages
Obj http://archive.ubuntu.com precise-updates/multiverse i386 Packages
Obj http://archive.ubuntu.com precise-updates/main TranslationIndex
Obj http://archive.ubuntu.com precise-updates/multiverse TranslationIndex
Obj http://archive.ubuntu.com precise-updates/restricted TranslationIndex
Obj http://archive.ubuntu.com precise-updates/universe TranslationIndex
Obj http://archive.ubuntu.com precise-security/main Sources
Obj http://archive.ubuntu.com precise-security/restricted Sources
Obj http://archive.ubuntu.com precise-security/universe Sources
Obj http://archive.ubuntu.com precise-security/multiverse Sources
Obj http://archive.ubuntu.com precise-security/main i386 Packages
Obj http://archive.ubuntu.com precise-security/restricted i386 Packages
Obj http://archive.ubuntu.com precise-security/universe i386 Packages
Obj http://archive.ubuntu.com precise-security/multiverse i386 Packages
Obj http://archive.ubuntu.com precise-security/main TranslationIndex
Obj http://archive.ubuntu.com precise-security/multiverse TranslationIndex
Obj http://archive.ubuntu.com precise-security/restricted TranslationIndex
Obj http://archive.ubuntu.com precise-security/universe TranslationIndex
Obj http://archive.ubuntu.com precise/main Translation-es
Obj http://archive.ubuntu.com precise/main Translation-en
Obj http://archive.ubuntu.com precise/multiverse Translation-es
Obj http://archive.ubuntu.com precise/multiverse Translation-en
Obj http://archive.ubuntu.com precise/restricted Translation-es
Obj http://archive.ubuntu.com precise/restricted Translation-en
Obj http://archive.ubuntu.com precise/universe Translation-es
Obj http://archive.ubuntu.com precise/universe Translation-en
Obj http://archive.ubuntu.com precise-updates/main Translation-es
Obj http://archive.ubuntu.com precise-updates/main Translation-en
Obj http://archive.ubuntu.com precise-updates/multiverse Translation-es
Obj http://archive.ubuntu.com precise-updates/multiverse Translation-en
Obj http://archive.ubuntu.com precise-updates/restricted Translation-es
Obj http://archive.ubuntu.com precise-updates/restricted Translation-en
Obj http://archive.ubuntu.com precise-updates/universe Translation-es
Obj http://archive.ubuntu.com precise-updates/universe Translation-en
Obj http://archive.ubuntu.com precise-security/main Translation-en
Obj http://archive.ubuntu.com precise-security/multiverse Translation-en
Obj http://archive.ubuntu.com precise-security/restricted Translation-en
Obj http://archive.ubuntu.com precise-security/universe Translation-en
Ign http://archive.canonical.com precise/partner Translation-es_AR
Ign http://archive.canonical.com precise/partner Translation-es
Ign http://extras.ubuntu.com precise/main Translation-es_AR
Ign http://archive.canonical.com precise/partner Translation-en
Ign http://extras.ubuntu.com precise/main Translation-es
Ign http://extras.ubuntu.com precise/main Translation-en
Leyendo lista de paquetes... Hecho
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias
Leyendo la información de estado... Hecho
Calculando la actualización... Listo
0 actualizados, 0 se instalarán, 0 para eliminar y 0 no actualizados.
gabriel@gabriel-UL30A:~$

Gracias.