I did it by updating the student and home edition to Premier service. Then, under "Benefits" you find the Use of of a second installation. I downloaded the Linux version for a second computer. Even for a second installation on a dual boot machine you need the second download and separate activation.
Of course, as expected, you have to renew the Primier service each year, For vs 13.0 Premier service was helpful because the Null version was a happening of of unexpected events. Thy gave me a special download adress to download a corrected version.
Regards Roland