简介
VirtualBox 是由德国 InnoTek 软件公司出品的虚拟机软件，现在则由甲骨文公司进行开发，是甲骨文公司xVM虚拟化平台技术的一部份。VirtualBox 提供用户在32位或64位的Windows、Solaris 及Linux 操作系统上虚拟其它x86的操作系统。用户可以在VirtualBox上安装并且运行 Solaris、Windows、DOS、Linux、OS/2 Warp、OpenBSD及FreeBSD等系统作为客户端操作系统。VirtualBox 与同性质的VMware及Virtual PC 比较下，VirtualBox独到之处包括远程桌面协议（RDP）、iSCSI及USB的支持，VirtualBox在客户机操作系统上已可以支持USB 2.0的硬件设备。
VirtualBox 最初是以专有软件协议的方式提供。2007年1月，InnoTek 以GNU通用公共许可证（GPL）释出 VirtualBox而成为自由软件，并提供二进制版本及开放源代码版本的代码。
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功能
- VirtualBox 支持Windows 所有平台双向拖放文件。
- 支持USB 3.0设备：虚拟机系统可识别USB3.0接口。
- 改进了CPU利用率：软件能够利用最新硬件指令发挥最高性能。
- 改进了磁盘映像加密：使用行业标准AES算法，这有助于确保数据的安全性。
- 增加了编辑菜单，VM窗口的快捷方式图标等功能。
更新
https://www.virtualbox.org/wiki/Changelog
VirtualBox 7.0.4 (released November 18 2022)
This is a maintenance release. The following items were fixed and/or added:
VMM: Added nested paging support for nested virtualization (Intel hosts only)
VMM: Fixed rare guru meditations with certain guests on macOS 10.15 (Catalina) (bug #21237)
VMM: Fixed possible VM process crash on Windows hosts when Hyper-V is used with certain guests (bug #21174)
VMM: Fixed Windows XP guest hang or BSOD on AMD CPUs under certain circumstances (bug #21256)
GUI: Various bugfixes for the Guest Control file manager
GUI: Added more informative file operations in the Guest Control file manager
GUI: Added an option to the global settings (the display page) to resize user interface font
GUI: Fixed a regression in new vm wizard. Selected virtual disks are no longer deleted when the wizard is cancelled (bug #21244)
GUI: Added a new menu item to the devices menu to optionally upgrade the guest additions.
VirtioSCSI: Fixed recognition of the virtio SCSI controller by the EFI firmware (bug #21200)
VirtioSCSI: Fixed hang when shutting down the VM if the virtio SCSI controller is used (bug #21144)
virtio-net: Workaround a bug in the virtio-net driver included in FreeBSD version up to 12.3 which renders the device non functional (bug #21201)
Storage: Fixed I/O errors with the VirtioSCSI controller when the host I/O cache is enabled (bug #19717)
VBoxManage: Fixed regression when ‘createmedium disk –variant RawDisk’ command resulted in invalid .vmdk file (bug #21125)
Main: Restored input pointing device behavior in multi-monitor VM configuration (bug #21137)
Main: Fixed progress indication during automatic Linux Guest Additions installation
Guest Control: Fixed path handling issues (bug #21095)
3D: Fixed VM process crash on macOS with 3D enabled (bug #21232)
Linux Host and Guest: General improvements in startup scripts
Linux Guest Additions: Introduced initial support for RHEL 8.7 and 9.2 kernels (bug #21272, #21258)
Linux Guest Additions: Introduced initial support for SLES 15.4 kernels
Linux Guest Additions: Fixed kernel modules rebuild behavior on system shutdown
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