Learning UNIX/Linux is required by University syllabus. Professionals learn Linux since it is the most popular server software.
Linux is a clone of UNIX. Knowing one is as good as knowing the other. In the tutorial series, we will be using Linux since, its freely available.
You don't even have to buy a new PC to learn Linux. You can run Linux, right within your existing Windows or Mac OS systems! (Detailed steps given in tutorials).
Refer the tutorials sequentially one after other to maximise the effectiveness of the training material.
The training will require you to do certain commands. Make sure to execute them!