If you want to improve your linux skills and abilities i recommend this book of exercises. It is designed for LPIC-1, but maybe it can help your for your certification. Have a nice day :)https://www.amazon.com/LPIC-1-101-500-Practice-Exams-Questions/dp/0244466165/ref=mp_s_a_1_1?keywords=9780244466169&qid=1560775081&s=gateway&sr=8-1 …
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