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Virt-manager allows users to: create, edit, start and stop VMs; view and control each VM's console; see performance and utilization statistics for each VM; view all running VMs and hosts, and their live performance or resource utilization statistics. use KVM, Xen or QEMU virtual machines, running either locally or remotely. use LXC containers
In the hypervisor support mode, QEMU either acts as a Virtual Machine Manager (VMM) or as a device emulation back-end for virtual machines running under a hypervisor. The most common is Linux's KVM but the project supports a number of hypervisors including Xen, Apple's HVF, Windows' WHPX, and NetBSD's NVMM. [9]
Kernel-based Virtual Machine/QEMU (KVM) – open-source hypervisor for Linux and SmartOS [11] Xen – bare-metal hypervisor; User-mode Linux (UML) – paravirtualized kernel; VirtualBox – hypervisor by Oracle (formerly by Sun) for Windows, Linux, macOS, and Solaris; VMware ESXi and GSX – hypervisors for Intel hardware
Some other products such as VMware and Virtual PC use similar approaches to Bochs and QEMU, however they use a number of advanced techniques to shortcut most of the calls directly to the CPU (similar to the process that JIT compiler uses) to bring the speed to near native in most cases.
[11] Xspice The X.Org Server driver for the QXL framebuffer device includes a wrapper script, [12] which makes it possible to launch a Xorg server whose display is exported via the SPICE protocol. This enables use of SPICE in a remote desktop environment, without requiring QEMU/KVM virtualization. virt-viewer
Virtual Machine Manager – supports creating, editing, starting, and stopping KVM-based virtual machines, as well as live or cold drag-and-drop migration of VMs between hosts. Proxmox Virtual Environment – an open-source virtualization management package including KVM and LXC. It has a bare-metal installer, a web-based remote management GUI ...
Windows Subsystem for Linux (WSL) is a feature of Microsoft Windows that allows for using a Linux environment without the need for a separate virtual machine or dual booting. WSL is installed by default in Windows 11. [ 2 ]
Xen HVM has device emulation based on the QEMU project to provide I/O virtualization to the virtual machines. The system emulates hardware via a patched QEMU "device manager" (qemu-dm) daemon running as a backend in dom0. This means that the virtualized machines see an emulated version of a fairly basic PC.