3 - 4 months ? I think that's good enough for you to nail it bro. I'm actually thinking of taking the same cert as everyone is moving towards Linux. I heard the Debian flavor is yummy so I'm going for it. And no, I've never tried Linux but I'm going to have it installed on my PC soon.. and start working towards the exam. It shouldn't be so hard.. after all it's not about coding all the time.