ELi5: What does the term “bare metal” refer to when it comes to virtual machines? To me, it just sounds like having two different operating systems on the same computer that you can switch between on the boot screen.

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Someone PLEASE explain to me what bare metal is and why I keep hearing about bare metal hypervisors.

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“Bare metal” refers to a physical computer.

Normally when you are using VMs you run a normal OS like Windows or Linux, then you run your VM software (hypervisor) and then than runs your guest OS (Windows, Linux, whatever).

With bare metal hypervisor, you don’t run a normal OS first. The hypervisor is it’s own OS that then runs other OSes. Removes one layer of software so increases performance.
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