keeping the good advise from @SASKiwi and @Anand_V close to our hearts, you will probably see there are several options, and considerations, to keep in mind. Not only that! As @MargaretC luckily has shared today, you might want to check out the differences between SAS in a physical host vs SAS in a virtualised environment.
I will explain to you how this works in few words:
There is no explanation with few words 🙂
Depending on your SAS solution, the integrations and the capabilities at your company, a professional should select first the method for this migration + upgrade and the right order. And this is not always very easy (almost never is), as there will be an aspect that will always "suffer" in the process, and you will need a balance.
I would highly recommend you to get onboard SAS and infrastructure architecture knowledge. Once the specific path and high level overview is chosen, the steps (details) can be defined.
I can only say that I am sorry, I am aware this is not the answer you were looking for, but it is my most humble and honest answer.