Hi everyone, I've been a lurker around these parts but I figured now was the time to finally join the community as I'm throwing myself into IT education (long overdue).
I'm going to be taking the GSEC401 Security Essentials bootcamp in a week or so and there's a module for Linux.
Just wanted to ask, what level of Linux skill will I require? I'm pretty new to it and I'm worried that without some level of proficiency, I'll miss out on all the good stuff the instructor will go through.

I also need to setup a laptop for the course that will require Windows 7 and Kali Linux, but all I have at the moment is a 2014 Macbook Air with about 4GB of RAM. Will this be enough to run it all without too much problem?