Preparando para reemplazar libc6 2.15-0ubuntu10.5 (usando .../libc6_2.15-0ubuntu10.13_amd64.deb) ...

A copy of the C library was found in an unexpected directory:
  '/lib/x86_64-linux-gnu/libc-2.15.so'
It is not safe to upgrade the C library in this situation;
please remove that copy of the C library or get it out of
'/lib/x86_64-linux-gnu' and try again.

dpkg: error al procesar /var/cache/apt/archives/libc6_2.15-0ubuntu10.13_amd64.deb (--unpack):
 el subproceso script pre-installation nuevo devolvió el código de salida de error 1