I noticed that this thread has not had any other responses in a while, it would be noteworthy to inform you of another solution for license management for Linux and Win.
It is great, east to use and incredibly accurate. You can download a trail version and then use the free demo once it expires if you are monitoring less than 50 users. Check it out here : http://www.x-formation.com/
A great option and definitely worth looking into. Cheers!