This is a real noob question. I have never taken a proper look at a server. Can someone kindly explain what is inside a server (the hardware)? And how the user interacts with it?
All the images online show some "rack", "tower", "blade" etc... (what else?) without any screen/output or any input devices. It makes me wonder how to even start installing the OS or anything in it.
I make no sense of "rack" and "blade" expect that they can be stacked like document trays, but I imagine the "tower" server the similar to our home PC CPU except that the motherboard inside only has many HDD, RAM and NIC slots -- nothing else. Is that what it is?
Appreciate any inputs to help me understand how it works. Thanks.