Imposible actualizar software

[Mery Riba Senar]

E: No se pudo abrir el fichero de bloqueo «/var/lib/dpkg/lock» - open (13: Permiso denegado)

Se encontraron errores al procesar:
 /var/cache/apt/archives/libc6_2.15-0ubuntu10.5_amd64.deb
 /var/cache/apt/archives/libc6_2.15-0ubuntu10.5_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libc6 2.15-0ubuntu10.4
ProcVersionSignature: Ubuntu 3.2.0-55.85-generic 3.2.51
Uname: Linux 3.2.0-55-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.5
Architecture: amd64
Date: Sat Nov 23 15:46:55 2013
ErrorMessage: ErrorMessage: el subproceso script pre-installation nuevo devolvió el código de salida de error 1
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
SourcePackage: eglibc
Title: package libc6 2.15-0ubuntu10.4 failed to install/upgrade: ErrorMessage: el subproceso script pre-installation nuevo devolvió el código de salida de error 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.