To share your screen or documents in an Adobe Connect room, first install the Connect Add-in. Previously, the Add-in was only available to Windows and Mac OS users. But with Adobe Connect 8, Adobe has extended support to Linux via Ubuntu. At this time, Ubuntu version 10.04 (or Lucid Lynx) is the only supported version of Linux.
To verify that your Ubuntu version supports the Add-in, select System, and then click About Ubuntu.