After trying apt-get update and apt-get upgrade I have the following error message: This is a coppy of my terminal (in spanish)

root@LinuxJGP:/home/javiergp# apt-get upgrade
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias       
Leyendo la información de estado... Hecho
Se actualizarán los siguientes paquetes:
  apport apport-symptoms fonts-liberation gnome-icon-theme gnome-orca language-pack-en language-pack-en-base
  language-pack-es language-pack-es-base language-pack-gnome-en language-pack-gnome-en-base
  language-pack-gnome-es language-pack-gnome-es-base light-themes linux-firmware oneconf resolvconf
  sessioninstaller software-center ssl-cert tzdata ubuntu-docs ubuntu-keyring ubuntu-sso-client
  ubuntuone-control-panel ubuntuone-installer unity-lens-video unity-scope-video-remote xdiagnose
29 actualizados, 0 se instalarán, 0 para eliminar y 0 no actualizados.
E: Los archivos de índice de paquetes están dañados. No existe un campo «Filename:» para el paquete ubuntu-keyring.

How can resolve this problem?

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It looks like your spanish error is the equivalent of this English one:

 the package index files are corrupted. no filename field for package

This would mean you have a problem with the listings (index) of all packages: they are broken. This Thread implies that you might have success with removing the lists directory.

So you might want to delete everything in /var/lib/apt/lists/, and then update your apt again

sudo rm /var/lib/apt/lists/*
sudo apt-get update

MIND YOU, I have not tried this, but it seems like this isn't a real dangerous thing to do.

The /var/lib/apt/lists can be removed and recreated safely. An 'apt-get update' will repopulate the necessary information. This does not impact the history of installed packages.

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  • The origional thread also mentions that the user had a problem with the rm command, as there was a directory called partial in there. You can obviously remove that one to by using rm -r, but that is more of a "how does rm work" problem :D – Nanne Nov 12 '12 at 16:25

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