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Running Ubuntu Live CD under VirtualBox on Ubuntu. Users of VirtualBox can load multiple guest OSes under a single host operating-system (host OS). Each guest can be started, paused and stopped independently within its own virtual machine (VM).
Oracle VirtualBox (formerly OSE, GPLv2), with Guest Additions (GPLv2) [28] Yes Yes Yes Yes Yes Yes branched [29] Yes Yes with Guest Additions [30] with Guest Additions [30] No Oracle VirtualBox with Extension Pack (PUEL) and Guest Additions (GPLv2) [28] Yes Yes Yes Yes OpenGL 2.0 and Direct3D 8/9 [31] Yes branched [29] Yes Yes Yes Yes
The other changes are mostly additions of virtual drivers: cobd (block device), conet (network), and cocon (console). Most of the changes in the i386 tree involve the initialization and setup code. It is a goal of the Cooperative Linux kernel design to remain as close as possible to the standalone i386 kernel, so all changes are localized and ...
The "guest" operating system environments share the same running instance of the operating system as the host system. Thus, the same operating system kernel is also used to implement the "guest" environments, and applications running in a given "guest" environment view it as a stand-alone system.
As with KQEMU, VirtualBox runs nearly all guest code natively on the host via the VMM (Virtual Machine Manager) and uses the re-compiler only as a fallback mechanism – for example, when guest code executes in real mode. [22] In addition, VirtualBox did a lot of code analysis and patching using a built-in disassembler to minimize recompilation.
The paravirt-ops code (often shortened to pv-ops) was included in the mainline Linux kernel as of the 2.6.23 version, and provides a hypervisor-agnostic interface between the hypervisor and guest kernels. Distribution support for pv-ops guest kernels appeared starting with Ubuntu 7.04 and RedHat 9.
Hyper-V is a native hypervisor developed by Microsoft; it can create virtual machines on x86-64 systems running Windows. [1] It is included in Pro and Enterprise editions of Windows NT (since Windows 8) as an optional feature to be manually enabled. [2]
Linux additions are supported in Microsoft Virtual Server, and these additions should also work in Virtual PC. [60] Some Linux distributions must be installed in text mode, as they do not support Microsoft Virtual PC's emulated graphics chip. Ubuntu 8.10 "Intrepid Ibex" must be installed in SafeMode, but does not require other changes.