The link below is a Extremely well written and easy to understand Linux Command Line Guide written by William E. Shotts, Jr. that he provides to the Linux Professional Institute for free, and I’m providing here for quick and easy access.
I highly recommend reading this as it has helped me understand the Linux Command line 1000 fold (which is most of the exam).
Hope it Helps, Enjoy!
https://drive.google.com/file/d/0B8vEVkp3oTd_NnEzbUh0alg0LTQ/edit?usp=sharing
