alfonso@alfonso:~$ sudo apt-get update
Ign http://extras.ubuntu.com precise Release.gpg
Ign http://archive.canonical.com precise Release.gpg
Ign http://dl.google.com stable Release.gpg
Ign http://archive.canonical.com precise Release
Ign http://archive.canonical.com precise/partner Sources/DiffIndex
Ign http://extras.ubuntu.com precise Release
Ign http://dl.google.com stable Release
Ign http://archive.canonical.com precise/partner i386 Packages/DiffIndex
Ign http://archive.canonical.com precise/partner TranslationIndex
Ign http://dl.google.com stable/main i386 Packages/DiffIndex
Ign http://extras.ubuntu.com precise/main Sources/DiffIndex
Ign http://archive.ubuntu.com precise Release.gpg
Ign http://archive.ubuntu.com precise-security Release.gpg
Ign http://archive.ubuntu.com precise-updates Release.gpg
Ign http://dl.google.com stable/main TranslationIndex
Ign http://extras.ubuntu.com precise/main i386 Packages/DiffIndex
Ign http://extras.ubuntu.com precise/main TranslationIndex
Ign http://archive.ubuntu.com precise Release
Ign http://archive.ubuntu.com precise-security Release
Ign http://archive.ubuntu.com precise-updates Release
Ign http://archive.ubuntu.com precise/main TranslationIndex
Ign http://archive.ubuntu.com precise/multiverse TranslationIndex
Ign http://archive.ubuntu.com precise/restricted TranslationIndex
Ign http://archive.ubuntu.com precise/universe TranslationIndex
Err http://archive.canonical.com precise/partner Sources
  404  Not Found
Err http://archive.canonical.com precise/partner i386 Packages
  404  Not Found
Ign http://archive.canonical.com precise/partner Translation-es_ES
Ign http://archive.canonical.com precise/partner Translation-es
Ign http://archive.canonical.com precise/partner Translation-en
Ign http://archive.ubuntu.com precise-security/main TranslationIndex
Ign http://archive.ubuntu.com precise-security/multiverse TranslationIndex
Ign http://archive.ubuntu.com precise-security/restricted TranslationIndex
Ign http://archive.ubuntu.com precise-security/universe TranslationIndex
Err http://dl.google.com stable/main i386 Packages
  404  Not Found
Ign http://dl.google.com stable/main Translation-es_ES
Ign http://dl.google.com stable/main Translation-es
Err http://extras.ubuntu.com precise/main Sources
  404  Not Found
Err http://extras.ubuntu.com precise/main i386 Packages
  404  Not Found
Ign http://dl.google.com stable/main Translation-en
Ign http://archive.ubuntu.com precise-updates/main TranslationIndex
Ign http://archive.ubuntu.com precise-updates/multiverse TranslationIndex
Ign http://archive.ubuntu.com precise-updates/restricted TranslationIndex
Ign http://archive.ubuntu.com precise-updates/universe TranslationIndex
Ign http://extras.ubuntu.com precise/main Translation-es_ES
Ign http://extras.ubuntu.com precise/main Translation-es
Ign http://extras.ubuntu.com precise/main Translation-en
Err http://archive.ubuntu.com precise/main i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise/restricted i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise/universe i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise/multiverse i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-security/main i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-security/restricted i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-security/universe i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-security/multiverse i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-updates/main i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-updates/restricted i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-updates/universe i386 Packages
  404  Not Found
Err http://archive.ubuntu.com precise-updates/multiverse i386 Packages
  404  Not Found
Ign http://archive.ubuntu.com precise/main Translation-es_ES
Ign http://archive.ubuntu.com precise/main Translation-es
Ign http://archive.ubuntu.com precise/main Translation-en
Ign http://archive.ubuntu.com precise/multiverse Translation-es_ES
Ign http://archive.ubuntu.com precise/multiverse Translation-es
Ign http://archive.ubuntu.com precise/multiverse Translation-en
Ign http://archive.ubuntu.com precise/restricted Translation-es_ES
Ign http://archive.ubuntu.com precise/restricted Translation-es
Ign http://archive.ubuntu.com precise/restricted Translation-en
Ign http://archive.ubuntu.com precise/universe Translation-es_ES
Ign http://archive.ubuntu.com precise/universe Translation-es
Ign http://archive.ubuntu.com precise/universe Translation-en
Ign http://archive.ubuntu.com precise-security/main Translation-es_ES
Ign http://archive.ubuntu.com precise-security/main Translation-es
Ign http://archive.ubuntu.com precise-security/main Translation-en
Ign http://archive.ubuntu.com precise-security/multiverse Translation-es_ES
Ign http://archive.ubuntu.com precise-security/multiverse Translation-es
Ign http://archive.ubuntu.com precise-security/multiverse Translation-en
Ign http://archive.ubuntu.com precise-security/restricted Translation-es_ES
Ign http://archive.ubuntu.com precise-security/restricted Translation-es
Ign http://archive.ubuntu.com precise-security/restricted Translation-en
Ign http://archive.ubuntu.com precise-security/universe Translation-es_ES
Ign http://archive.ubuntu.com precise-security/universe Translation-es
Ign http://archive.ubuntu.com precise-security/universe Translation-en
Ign http://archive.ubuntu.com precise-updates/main Translation-es_ES
Ign http://archive.ubuntu.com precise-updates/main Translation-es
Ign http://archive.ubuntu.com precise-updates/main Translation-en
Ign http://archive.ubuntu.com precise-updates/multiverse Translation-es_ES
Ign http://archive.ubuntu.com precise-updates/multiverse Translation-es
Ign http://archive.ubuntu.com precise-updates/multiverse Translation-en
Ign http://archive.ubuntu.com precise-updates/restricted Translation-es_ES
Ign http://archive.ubuntu.com precise-updates/restricted Translation-es
Ign http://archive.ubuntu.com precise-updates/restricted Translation-en
Ign http://archive.ubuntu.com precise-updates/universe Translation-es_ES
Ign http://archive.ubuntu.com precise-updates/universe Translation-es
Ign http://archive.ubuntu.com precise-updates/universe Translation-en
W: Imposible obtener http://archive.canonical.com/ubuntu/dists/precise/partner/source/Sources  404  Not Found

W: Imposible obtener http://archive.canonical.com/ubuntu/dists/precise/partner/binary-i386/Packages  404  Not Found

W: Imposible obtener http://dl.google.com/linux/chrome/deb/dists/stable/main/binary-i386/Packages  404  Not Found

W: Imposible obtener http://extras.ubuntu.com/ubuntu/dists/precise/main/source/Sources  404  Not Found

W: Imposible obtener http://extras.ubuntu.com/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise/restricted/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise/universe/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise/multiverse/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-security/main/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-security/restricted/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-security/universe/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-security/multiverse/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-updates/main/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-updates/restricted/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-updates/universe/binary-i386/Packages  404  Not Found

W: Imposible obtener http://archive.ubuntu.com/ubuntu/dists/precise-updates/multiverse/binary-i386/Packages  404  Not Found

E: Algunos archivos de índice fallaron al descargar. Se han ignorado, o se han utilizado unos antiguos en su lugar
alfonso@alfonso:~$