aparecida@Aparecida:~$ apt-cache policy libc6
libc6:
  Instalado: 2.15-0ubuntu10.3
  Candidato: 2.15-0ubuntu10.4
  Tabela de versão:
     2.15-0ubuntu10.4 0
        500 http://br.archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages
 *** 2.15-0ubuntu10.3 0
        100 /var/lib/dpkg/status
     2.15-0ubuntu10.2 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main i386 Packages
     2.15-0ubuntu10 0
        500 http://br.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
aparecida@Aparecida:~$