VirtualBox最早是德国一家软件公司InnoTek所开发的虚拟系统软件,后来被Sun收购,改名为Sun VirtualBox,性能有很大的提高.因为他是开源的,不同于VM,而且功能强大,可以在 Linux/Mac 和 Windows 主机中运行, 并 支持在其中安装 Windows (NT 4.0、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.假如你曾经有用过虚拟机软件的经历的话，相信使用 VirtualBox 不在话下。即便你是一个新手，也没有关系。VirtualBox 提供了详细的文档，可以助你在短期内入门。

下载:VirtualBox 3.0.4

VirtualBox 3.0.2 (released 2009-07-10)

This is a maintenance release. The following items were fixed and/or added:

• VMM: fixed network regressions (guest hangs during network IO) (bug #4343)
• VMM: guest SMP performance improvements
• VMM: fixed hangs and poor performance with Kaspersky Internet Security (VT-x/AMD-V only; bug <A class="reopened ticket" title="Windows XP Guest crash with Kaspersky 2009 (rdpmc) -> fixed in SVN (reopened)" href="http://www.virtualbox.org/ticket/1778">#1778)
• VMM: fixed crashes when executing certain Linux guests (software virtualization only; bugs <A class="closed ticket" title="Voyage Linux iso boot failure -> fixed in SVN/3.0.2 (closed)" href="http://www.virtualbox.org/ticket/2696">#2696 & <A class="closed ticket" title="Astaro => VBox crash -> fixed in SVN/3.0.2 (closed)" href="http://www.virtualbox.org/ticket/3868">#3868)
• ACPI: fixed Windows 2000 kernel hangs with IO-APIC enabled (bug <A class="closed ticket" title="unable to start Windows 2000 installation with IO-APIC enabled -> fixed in ... (closed)" href="http://www.virtualbox.org/ticket/4348">#4348)
• APIC: fixed high idle load for certain Linux guests (3.0 regression)
• BIOS: properly handle Ctrl-Alt-Del in real mode
• iSCSI: fixed configuration parsing (bug #4236)
• OVF: fix potential confusion when exporting networks
• OVF: compatibility fix (bug #4452)
• NAT: fixed crashes under certain circumstances (bug <A class="closed ticket" title="WinXP VM Aborts on Microsoft L2TP VPN Connect --> fixed in SVN (closed)" href="http://www.virtualbox.org/ticket/4330">#4330)
• 3D support: fixed dynamic linking on Solaris/OpenSolaris guests (bug <A class="closed ticket" title="OpenSolaris additions break GL -> Fixed in SVN. (closed)" href="http://www.virtualbox.org/ticket/4399">#4399)
• 3D support: fixed incorrect context/window tracking for multithreaded apps
• Shared Folders: fixed loading from saved state (bug #1595)
• Shared Folders: host file permissions set to 0400 with Windows guest (bug <A class="closed ticket" title="windows guest - linux host file permissions changed on shared folders -> ... (closed)" href="http://www.virtualbox.org/ticket/4381">#4381)
• X11 host and guest clipboard: fixed a number of issues, including bug <A class="closed ticket" title="Copy/Paste not working in Windows guest -> fixed in SVN (closed)" href="http://www.virtualbox.org/ticket/4380">#4380 and <A class="closed ticket" title="3.0.0 VBoxClient incompatible with Solaris 10 version of libX11.so.4 -> ... (closed)" href="http://www.virtualbox.org/ticket/4344">#4344
• X11 Additions: fixed some issues with seamless windows in X11 guests (bug <A class="closed ticket" title="Resizing windows in seamless mode not functioning properly -> fixed in SVN (closed)" href="http://www.virtualbox.org/ticket/3727">#3727)
• Windows Additions: added VBoxServiceNT for NT4 guests (for time synchronization and guest properties)
• Windows Additions: fixed version lookup
• Linux hosts: workaround for buggy graphics drivers showing a black VM window on recent distributions (bug #4335)
• Linux hosts: fixed typo in kernel module startup script (bug <A class="closed ticket" title="Error in linux /etc/init.d/vboxdrv stop_vms() function => Fixed in SVN (closed)" href="http://www.virtualbox.org/ticket/4388">#4388)
• Installer: support Pardus Linux
• Solaris hosts: several installer fixes
• Solaris host: fixed a preemption issue causing VMs to never start on Solaris 10 (bug #4328).
• Solaris guest: fixed mouse integration for OpenSolaris 2009.06 (bug <A class="closed ticket" title="Vbox 3.0 mouse pointer disappears -> fixed in SVN (closed)" href="http://www.virtualbox.org/ticket/4365">#4365)
• Windows hosts: fixed high CPU usage after resuming the host (bug <A class="closed ticket" title="VBoxSVC.exe 100% CPU after WinXP SP3 Hibernate -> fixed in SVN/3.0.2 (closed)" href="http://www.virtualbox.org/ticket/2978">#2978)
• OVF: accept ovf:/disk/ specifiers with a single slash in addition to ovf://disk/ (bug #4452)
• Fixed a settings file conversion bug which sometimes caused hardware acceleration to be enabled for virtual machines that had no explicit configuration in the XML.