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I want to understand how to use KVM in CenTOS. At the moment, all I have is a VMWare ESX 5.x server to use. Is there a way to get KVM working on a system that is running on VMWare? Essentially, a nested install?

This will not be used for production purposes, only testing/learning.

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Yes it is possible, you have to enable nested virtualisation - virtuallyghetto.com/2012/08/… –  Ulrich Dangel Jan 28 '13 at 0:45
@Urlich: Please convert the comment to an answer. –  pilona Oct 26 '13 at 17:54
@Mike B: "install" is misleading most of the time. KVM is just a facility offered by the kernel (accessed through the character device at /dev/kvm). CentOS should have the kernel module in the kernel package by default (though it could also be compiled-in). What you install is the hypervisor that makes use of KVM (e.g., QEMU). –  pilona Oct 26 '13 at 18:10
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