KVM: Linux Virtualization That's Halfway There
Are you looking for a reliable virtualization package to run multiple virtual machines that handle unmodified Linux or Windows images? Then look no further than your existing Linux configuration. It already has the underpinnings to support Kernel-based Virtual Machine (KVM).
You need look no further than your distro's package repository to install KVM. This package is a full virtualization solution for Linux on x86 hardware. It includes virtualization extensions (Intel VT or AMD-V) and a loadable kernel module, kvm.ko. This is the core virtualization infrastructure along with a processor-specific module, kvm-intel.ko or kvm-amd.ko.
You will probably need to also install a modified QEMU configured for your distro --