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apt-cache policy unity

unity:

  Installed: 7.2.3+14.04.20140826-0ubuntu1

  Candidate: 7.2.4+14.04.20141217-0ubuntu1

  Version table:

     7.2.4+14.04.20141217-0ubuntu1 0

        500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages

 *** 7.2.3+14.04.20140826-0ubuntu1 0

        100 /var/lib/dpkg/status

     7.2.2+14.04.20140714-0ubuntu1.1 0

        500 http://archive.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages

     7.2.0+14.04.20140416-0ubuntu1 0

        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages