To join Collaborate Classic sessions in Ubuntu, you’ll need to install OpenJDK 7 and some extra packages

Ubuntu Software CentreOpen up the Ubuntu Software Centre. Search for, and install the following:

  • OpenJDK Java 7 Runtime
  • IcedTea Java Web Start
  • IcedTea Java PlugIn

If you have other java runtimes installed, you will need to set OpenJDK as the default (see step two at that link).

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