对于VMWare、Virtual PC这些虚拟机软件，可能大家都比较熟悉。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 (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 2.1.4 (released 2009-02-16)
This is a maintenance release. The following items were fixed and/or added:
- Windows hosts: fixed host crashes/hangs on certain 32 bits Windows systems when running Linux guests (bugs #1606, #2269, #2763)
- Windows hosts: Fixed network component BSOD issue (bugs #3168, #2916)
- Windows hosts: Fixed installation issues (bugs #2517, #1730, #3130)
- Linux hosts: fixed occasional kernel oopses (bug #2556)
- Linux hosts: fixed module dependency for shipped modules (bug #3115)
- Linux hosts: moved the udev rules for USB forward so that they don’t override existing system rules (bug #3143)
- Linux hosts: fixed the issue with guest not being able to communicate with each other when attached via TAP interfaces (bug #3215)
- Linux hosts: give up probing for USB gracefully if dbus or hal are not available (bug #3136)
- Linux hosts: fixed warnings in installer when SELinux was disabled (bug #3098)
- Linux hosts: VirtualBox sometimes failed to start if it had been started using sudo previously (bug #3270)
- Solaris hosts: fixed high CPU load while running many guests in parallel
- Solaris hosts: fixed inability to start more than 128 VMs
- VMM: fixed performance regression for Windows guests (bug #3172)
- VMM: ignore CPU stepping when restoring a saved state/snapshot
- REM: fixed inability to use gdb to debug programs in Linux guests with software virtualization (bug #3245)
- GUI: fixed dead key handling on Solaris hosts (bug
