apt-cache policy postgresql-common
postgresql-common:
  Installed: 179
  Candidate: 179
  Version table:
 *** 179 500
        500 http://br.archive.ubuntu.com/ubuntu zesty/main amd64 Packages
        500 http://br.archive.ubuntu.com/ubuntu zesty/main i386 Packages
        100 /var/lib/dpkg/status