VirtualBox是德国一家软件公司InnoTek所开发的虚拟系统软件，它不仅具有丰富的特色，而且性能也很优异。更是开源的，成为了一个发布在GPL许可之下的自由软件。VirtualBox 可以在 Linux 和 Windows 主机中运行，并支持在其中安装 Windows (NT4.0、2000、XP、Server 2003、
vista)、DOS/Windows 3.x、Linux (2.4 和 2.6)、OpenBSD 等系列的客户操作系统。
VirtualBox 1.6.的完整更改记录如下：
* GUI: added accessibility support (50
* GUI: VM session information dialog
* VBoxHeadless: renamed from VBoxVRDP
* VMM: reduced host CPU load of idle guests
* VMM: many fixes for VT-x/SVM hardware-supported virtualization
* ATA/IDE: better disk geometry compatibility with VMware images
* ATA/IDE: virtualize an AHCI controller
* Storage: better write optimization, prevent images from growing unnecessarily.
* Network: support PXE booting with NAT
* Network: fixed the Am79C973 PCNet emulation for Nexenta guests
* NAT: improved builtin DHCP server (implemented DHCPNAK response)
* NAT: port forwarding stopped when restoring the VM from a saved state
* NAT: make subnet configurable
* XPCOM: moved to libxml2
* XPCOM: fixed VBoxSVC autostart race
* Audio: SoundBlaster 16 emulation
* USB: fixed problems with USB 2.0 devices
* MacOS X: fixed seamless mode
* MacOS X: better desktop integration, several look’n’feel fixes
* MacOS X: switched to Quartz2D framebuffer
* MacOS X: added support for shared folders
* MacOS X: added support for clipboard integration
* Solaris: added host audio playback support (experimental)
* Solaris: made it possible to run VirtualBox from non-global zones
* Shared Folders: made them work for NT4 guests
* Shared Folders: many bugfixes to improve stability
* Seamless windows: added support for Linux guests
* Linux installer: support DKMS for compiling the kernel module
* Linux host: compatibility fixes with Linux 2.6.25
* Windows host: support for USB devices has been significantly improved; many additional USB devices now work
* Windows Additions: automatically install
AMD PCNet drivers on
vista guests
* Linux additions: several fixes, experimental support for RandR 1.2
* Linux additions: compatibility fixes with Linux 2.6.25
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来源：泡泡网
