I just recently took it, though had a different instructor. You can go into this course knowing nothing (I had a few people in my class who were in this boat). Know some Linux will help, but they teach you some basics on day 1 in case you don’t know any. My best advice would be to make a good index of the books for the test, and don’t rush through it. With 4 hours to take it, you can almost lookup every question if you have a very good index.