VirtualBox 4.1 final is released for Linux. It is a general-purpose full virtualizer for x86 hardware, targeted at server, desktop and embedded use.
This version is a major update. The following major new features were added:
* Support for cloning of VMs (bug #5853, see the manual for more information): full clones can be created through the GUI and VBoxManage, linked clones only through VBoxManage
* GUI: enhanced wizard for creating new virtual disks
* GUI: new wizard for copying virtual disks
* GUI: keep the aspect ratio in scale mode (Windows and OSX hosts only; bug #7822)
* VMM: raised the memory limit for 64-bit hosts to 1TB
* Experimental support for PCI passthrough for Linux hosts, see the manual for more information
* Windows guests: Experimental WDDM graphics driver, supporting Windows Aero (bug #4607) and providing Direct3D support using a cleaner approach (no need to install the guest drivers in Safe Mode anymore)
* Guest Additions: status of modules and features can now be queried separately by the frontends
* Networking: new network attachment mode “Generic Driver”, which offers an open plugin architecture for arbitrary and separately distributable virtual network implementations
* Host-only Networking: fixed host crash in kernels prior to 2.6.29
* New Networking Mode UDP Tunnel: allows to interconnect VMs running on different hosts easily and transparently, see the manual for more information
* Experimental support for SATA hard disk hotplugging available with VBoxManage
* Solaris hosts: New Crossbow based bridged networking driver for Solaris 11 build 159 and ab
VirtualBox is the most popular virtualization software, now owned by Oracle after it bought Sun Microsystems. It works on all major 32-bit and 64-bit platforms, and supports a large number of guest operating systems.
Oracle VM VirtualBox allows users to create “virtual machines” in their host operating system so that they can install any guest OS, facilitating the development, cross-platform running and testing of multi-tier applications on a single computer.