samba:
  Installed: (none)
  Candidate: 2:3.6.3-2ubuntu2.1
  Version table:
     2:3.6.3-2ubuntu2.1 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     2:3.6.3-2ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages