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。
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VirtualBox 3.1.4 (released 2010-02-12)
This is a maintenance release. The following items were fixed and/or added:
- VMM: SMP stability fixes
- VMM: fixed guru meditation in certain rare cases (bug #5968)
- VMM: activate NXE for PAE enabled guests (VT-x and AMD-V on 32 bits hosts only; bug #3578)
- VMM: added workaround for broken BIOSes that make VirtualBox think AMD-V is in use (for details see bug )
- VMM: fixed rare host reboot when restoring a saved state (bug )
- VMM: fixed incompatibility with 2.6.32 Linux kernels (software virtualization only; bug )
- VMM: turn on nested paging by default for new VMs (if available; VT-x and AMD-V only)
- VMM: turn on VPID by default for new VMs (if available; VT-x only)
- VMM: perform strict CPUID compatibility checks when teleporting; to get the old behavior set "VBoxInternal/CPUM/StrictCpuIdChecks" to 0
- VMM: fixed VM crash with certain 16 bits Windows applications (software virtualization only; bug )
- Snapshots: fixed a 3.1 regression that broke deletion of snapshots when a machine had immutable or writethrough storage attached (bug )
- Saved state: fixed VERR_SSM_LOADED_TOO_MUCH error when loading DisplayScreenshot(bug )
- VBoxManage: add restorecurrent operation to snapshots command
- VBoxManage: fixed broken snapshot lookup by name (bug
- GUI: fixed the broken "Reload" button that reloads the machine XML when a machine is inaccessible
- GUI: fixed guest fullscreen mode after reboot (bug )
- GUI: handle Ctrl+Break properly on X11 hosts (bug )
- GUI: fixed status LEDs for storage devices
- GUI: workaround for disabling the seamless mode on KDE hosts (KWin bug)
- 3D support: fixed SELinux warning saying VBoxOGL.so requires text relocation (bug )
- 3D support: fixed Corrupted surface rendering (bug )
- 3D support: free textures on guest application termination (bug )
- 3D support: fixed ubigraph_server crashes ()
- 3D support: fixes for 64-bit Solaris guests
- Seamless: disable seamless mode when guest changes screen resolution (bug )
- NAT: fixed high CPU load under certain circumstances (Windows hosts only; bug )
- NAT: fixed handling of the broadcast flag in DHCP requests
- NAT: fixed rare crash due to an assertion in the ICMP code (bug )
- Virtio-net: don't crash when ports accessed beyond the valid range (bug #5923)
- LsiLogic: fix for Windows 7 guests
- ATA: fix for guru meditation when installing Solaris 8 guests (bug )
- VHD: fixed an incompatibility with Virtual PC (bug )
- VHD: update the footer backup after setting a new UUID (bug )
- Host DVD: really fixed loading "passthrough" setting from config file (bug )
- Shared folders: fixed resolving of symlink target on Linux (3.1.2 regression)
- VRDP: fixed VERR_NET_ADDRESS_IN_USE error when restarting a VM (3.1 regression; bug )
- VRDP: fixed crash on Mac OS X when 3D is enabled (3.1 regression)
- PulseAudio: fixed recording (bug )
- USB: fixed a shutdown blue screen (Windows hosts only; bug )
- BIOS: fixed attribute during text scroll (bug )
- OVF: fix strange error messages on disk import errors
- OVF: do not require write access the the .ovf file during import (3.1 regression; bug )
- iSCSI: fix taking snapshots of a running VM ()
- Solaris hosts: several USB fixes (including support for Apple iPod; bug )
- Solaris installer: fixed USB module removal and Solaris 10 "id" binary incompatibility
- Guest Additions: fixed wrong guest time adjustment if the guest clock is ahead (3.1 regression; non-Windows guests only)
- Linux Additions: fixed shared folders for Linux 2.6.32 guests (bug )
- Linux Additions: make the mouse driver work on Debian 5.0.3 guests again (3.1.2 regression, bug )
- Windows Additions: fixed malfunctioning !VBoxService that broke time-sync (bug )
- Windows Additions: fixed uninstallation issues on 64-bit guests
- Windows Additions: fixed some sysprep execution issues
- X.Org Additions: never reject the saved video mode as invalid (bug )
- XFree86 Additions: accept video mode hints for the initial mode again
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