root@xubuntu:/# apt-cache policy linux-image-generic
linux-image-generic:
  Installed: (none)
  Candidate: 4.2.0.19.21
  Version table:
     4.2.0.19.21 0
        500 http://us.archive.ubuntu.com/ubuntu/ wily-updates/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu/ wily-security/main amd64 Packages
     4.2.0.16.18 0
        500 http://us.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages