Below are a selection of links and materials that I personally have used and would recommend. Please note that I cannot be held liable for any negative impact using these resources may have on you.
How Linux Works
Unlike some operating systems, Linux doesn’t try to hide the important bits from you—it gives you full control of your computer. But to truly master Linux, you need to understand its internals, like how the system boots, how networking works, and what the kernel actually does.
Networking All-in-One For Dummies
Whether you’re in charge of a small network or a large network, Networking All-in-One is full of the information you’ll need to set up a network and keep it functioning. Fully updated to capture the latest Windows 10 releases through Spring 2018, this is the comprehensive guide to setting up, managing, and securing a successful network.