VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
Some of the features of VirtualBox are:
- Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
- Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.
- VMM: fixed emulation of certain instructions for 64-bit guests on 32-bit hosts
- VMM: properly handle certain MSRs for 64-bit guests on ancient CPUs without VT-x support for MSR bitmaps
- GUI: fixed a crash with multimonitor setups under certain conditions
- GUI: allow cloning of snapshots when the VM is running
- NVMe: fixed compatibility with the Storage Performance Development Kit
- VBoxSVC: fixed a crash under rare circumstances
- VBoxManage: added a sanity check to modifymedium --resize to prevent users from resizing their hard disk from 1GB to 1PB
- Windows hosts: another fix for recent Windows 10 hosts
- Linux hosts: Linux 4.10 fixes
- Linux Additions: fixed protocol error during certain operations on shared folders