UNIX and Linux Operating System Fundamentals
https://www.educba.com/course/unix-an...
There are no prerequisites for this course, other than a desire to learn the basics of the UNIX and Linux operating systems, which includes UNIX shell scripting. UNIX and Linux Operating System Fundamentals course begins with a brief history and overview of both UNIX and Linux, and then proceeds to teach you the skills required for working on a server running either operating system. Hands-on lab exercises are used to reinforce key concepts, and are completed by logging in on a real server in our Internet Lab from your work or home computer.