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I realize that Webex does not support Ubuntu 11, however I have a website running on my machine that I need to demo for a client and he will use webex. I need to be able to use the "share desktop" feature to do this. Is there any dependable way (gksudo, java installation, browser, anything) that lets you share your desktop?

I don't care if the audio crashes since we talk on the phone, and it's okay if it cuts out from time to time -- I just need him to be able to see it.

Alternatively, is there an easy way for me to switch to an ubuntu version that will allow me to share my desktop?

You could try ScreenLeap, which seems to have a very low setup overhead (it just downloads and runs a Java applet).

After much trial and error, I was able to get WebEx desktop sharing working in 64-bit Ubuntu just by installing a few packages:

1. 
   

   Remove unnecessary packages that cause conflicts:

   
   
   

   sudo apt remove icedtea-7-plugin:i386 icedtea-8-plugin:i386 icedtea-netx:i386
   
   

   
   


2. 
   

   Install 32-bit Java, a necessary 32-bit library, the Java plugin, and Firefox:

   
   
   
   
   
   • 
     

     Ubuntu 14.10+

     
     
     

     sudo apt install openjdk-8-jre:i386 libxmu6:i386 icedtea-8-plugin firefox
     
     

     
     
   
   
   • 
     

     Ubuntu 14.04 and below

     
     
     

     sudo apt-get install openjdk-7-jre:i386 libxmu6:i386 icedtea-7-plugin firefox
     
     

     
     
   
   
   
   


3. 
   

   Make sure the correct Java plugin is configured:

   
   
   
   
   
   • 
     

     Ubuntu 14.10+

     
     
     

     sudo update-alternatives --set mozilla-javaplugin.so /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
     
     

     
     
   
   
   • 
     

     Ubuntu 14.04 and below

     
     
     

     sudo update-alternatives --set mozilla-javaplugin.so /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
     
     

     
     
   
   
   
   

Close and re-open Firefox, and WebEx desktop sharing should work.

• 
  You must use Firefox. WebEx will not work on Google Chrome as Chrome for Linux no longer works with Java.


• If you don't remove and install the exact packages listed above, WebEx will work, but desktop sharing will not work.

Thanks bmaupin! For me this also works on a freshly installed 64-bit Ubuntu 16.04 (no upgrade from older Ubuntu)

Enabled 32-bit support (see also: http://www.unixmen.com/enable-32-bit-support-64-bit-ubuntu-13-10-greater/):

    sudo dpkg --add-architecture i386

    sudo apt-get update

    sudo apt-get upgrade

Installed openjdk and required plugins for Firefox

    sudo apt-get -y install openjdk-8-jre:i386 libxmu6:i386 icedtea-8-plugin

Set correct Java plugin for Firefox

    sudo update-alternatives --set mozilla-javaplugin.so /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so

Run WebEx

• Confirm all questions (trust WebEx domain, allow to use icedtea plugin, etc)


• Screen sharing works for me


• Audio does not yet work for me

So I've struggled with this for years, and finally have a solution.

1. Install Ubuntu 32-bit. 64-bit simply won't work with Cisco's Webex Java plugin. I fought this for years, and finally gave up. I installed Ubuntu into a VM using [testdrive][1].


2. sudo apt-get install icedtea-6-plugin


3. Join a Webex and have fun sharing your desktop!

Install Oracle Java to solve this issue

Press Ctrl+Alt+T on your keyboard to open a terminal window. When it opens, copy and paste the command below and hit enter. Input your user password when prompts and it will add the PPA repository into your system.

sudo add-apt-repository ppa:webupd8team/java

After that, update package lists via:

sudo apt-get update

To install Oracle Java 8, run:

sudo apt-get install oracle-java8-installer

Change the number 8 to 6 (or 7) in the code to install Java 6 (or 7).

While installation, you’ll be asked to agree the license and then the installer start downloading Java file from oracle website and install it on your system.

To set the default Java, run:

sudo apt-get install oracle-java8-set-default

Also change number 8 to the Java version you want.