To what extent is Linux prevalent in University maths departments? To what extent is Linux prevelant in University maths departments? I understand that distributions such as Scientific Linux and Fedora are quite popular, but I don't know whether this means 5% or 50% uptake. Is Linux the most common operating system in the world of maths academia, or is it still a minority player? If you were to estimate a percentage of maths academics who use Linux, what number would you suggest?
In Germany, Linux is pretty common as end user operating system in maths departments. I worked at three different universities in Germany and they all used it. 

On the other hand, many people use their private laptops for work (when they are at home or travel), and I guess (but don't know) that Linux is not so dominant there.