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.
- GUI: fixed keyboard shortcut handling regressions
- GUI: fixed keyboard handling regression for separate UI
- NAT: don't exceed the maximum number of "search" suffixes.
- NAT: fixed parsing of port-forwarding rules with a name which contains a slash
- NAT Network: when the host has only loopback nameserver that cannot be mapped to the guests (e.g. dnsmasq running on 127.0.1.1), make DHCP supply NAT Network DNS proxy as nameserver.
- Bridged Network: prevent flooding syslog with packet allocation error messages
- Audio: now using Audio Queues on Mac OS X hosts
- Audio: fixed recording with the PulseAudio backend (5.1 regression)
- Audio: various bugfixes
- Snapshots: fixed regression in 5.1.4 for deleting snapshots with several disks
- Snapshots: crash fix and better error reporting when snapshot deletion failed
- Storage: some fixes for the NVMe emulation with Windows guests
- API: fixed initialization of SAS controllers
- Build system: make it possible to build VBox on systems which default to Python 3
- Windows hosts: detect certain cases of REGDB_E_CLASSNOTREG errors and print a helpful error message
- Windows hosts: adapted to changes in Windows 10 build 14901
- Windows hosts: better support for processor groups on Windows 7 and later which is required on certain hosts with many CPUs
- Windows installer / Additions: added option to prevent creating of start menu items
- Windows Additions / VGA: if the guest's power management turns a virtual screen off, blank the corresponding VM window rather than hide the window
- Windows Additions: fixed a generic bug which could lead to freezing shared folders
- Linux hosts / guests: fix for kernels with CONFIG_CPUMASK_OFFSTACK set
- Linux Additions: don't require all virtual consoles be in text mode. This should fix cases when the guest is booted with a graphical boot screen
- Linux Additions: added depmod overrides for the vboxguest and vboxsf kernel modules to fix conflicts with modules shipped by certain Linux distributions
- X11 Additions: disable 3D on the guest if the host does not provide enough capabilities