If you're new to Linux, the biggest change from Windows or macOS is probably the command line. Depending on how you use Linux, you might not have to dip into the terminal often, but you will have to ...
Back in my early days of Linux, the terminal was a necessity. Now, the GUIs are so advanced, user-friendly, and powerful, that you could go your entire Linux career and never touch a terminal window.
There are certain Linux commands I consider essential. They range from networking, troubleshooting, and file viewing. They're also easy enough for new users to learn. Even though I've been using Linux ...