Cloud infrastructure wouldn’t be possible without open source.
You can’t work in IT without at least some knowledge of Linux. It is a foundational knowledge that is just expected of new hires. Development, operations, networking, or storage—doesn’t matter—Linux and the open source ecosystem are central to any infrastructure today. But it isn’t just Linux. The entire ecosystem that has built up around Linux and all the applications that come in a distribution are what is expected now. You have to bring skills higher in the application stack.