I took this free course, The Unix Workbench, over a year ago on Coursera: https://www.coursera.org/learn/unix
It’s based on the book, The Unix Workbench. It’s a pay what you want book.
This course will give you a good foundation on the basics of using Unix systems (Linux, Ubuntu, macOS, etc). I’ve used Linux for years but my knowledge was very fragmented. Taking this course taught me a lot.
I highly recommend taking this course. A lot of it will apply to growing your Chia farm. It’s because of this course I can read scripts and understand what they’re doing, know how to use git (the basics), and know how to figure things out when I don’t understand something (see a command you don’t understand? type man command-name to see what the command does.