apt-cache

linux-generic:
  Installed: 4.2.0.27.30
  Candidate: 4.2.0.27.30
  Version table:
 *** 4.2.0.27.30 0
        500 http://ca.archive.ubuntu.com/ubuntu/ wily-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ wily-security/main amd64 Packages
        100 /var/lib/dpkg/status
     4.2.0.16.18 0
        500 http://ca.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages