On Ubuntu 14.04, install Juniper VPN
$ update-alternatives --display java
Requirement
64 bit Mozilla Firefox browser is installed
First, install the 64bit jre/jdk and icedtea
$ sudo apt-get install openjdk-7-jre icedtea-7-plugin
Second, install the 32bit jre
$ sudo apt-get install openjdk-7-jre:i386
link update-alternatives to /usr/sbin/
juniper use it in that folder.
$ sudo ln -s /usr/bin/update-alternatives /usr/sbin/