Have to get used with BSD and ns-3

For a long time already, I wish I can be a linux guy. Few years ago I found that BSD and linux are actually two animals, in terms of the socket layer programming architecture. I found books for teaching BSD network programming but not linux. As such I am now installing FreeBSD. 

Another reason to go to FreeBSD is that I plan to use ns-3 to do simulation. ns-3 on Cygwin environment has too many sweet stuffs disabled, which is very ugly..! Moreover, seemingly that most "professional" software are developed for linux/BSD first, and that is why I am now more eager to be a BSD guy with higher .