VirtualBox is a general-purpose full virtualizer for hardware. Targeted at server, desktop and embedded use, it is now the only professional quality virtualization solution that is also Open Source Software.
VirtualBox is a powerful virtualization product for enterprise as well as home use. VirtualBox provides are useful for several scenarios: Running multiple operating systems simultaneously. VirtualBox allows you to run more than one operating system at a time. This way, you can run software written for one operating system on another (for example, Windows software on Linux or a Mac) without having to reboot to use it. Since you can conﬁgure what kinds of “virtual” hardware should be presented to each such operating system, you can install an old operating system such as DOS or OS/2 even if your real computer’s hardware is no longer supported by that operating system.
Software vendors can use virtual machines to ship entire software conﬁgurations. For example, installing a complete mail server solution on a real machine can be a tedious task. With VirtualBox, such a complex setup (then often called an “appliance”) can be packed into a virtual machine. Installing and running a mail server becomes as easy as importing such an appliance into VirtualBox.
Testing and disaster recovery. Once installed, a virtual machine and its virtual hard disks can be considered a “container” that can be arbitrarily frozen, woken up, copied, backed up, and transported between hosts. On top of that, with the use of another VirtualBox feature called “snapshots”, one can save a particular state of a virtual machine and revert back to that state, if necessary. This way, one can freely experiment with a computing environment. If something goes wrong (e.g. after installing misbehaving software or infecting the guest with a virus), one can easily switch back to a previous snapshot and avoid the need of frequent backups and restores. Any number of snapshots can be created, allowing you to travel back and forward in virtual machine time. You can delete snapshots while a VM is running to reclaim disk space.
Infrastructure consolidation. Virtualization can signiﬁcantly reduce hardware and electricity costs. Most of the time, computers today only use a fraction of their potential power and run with low average system loads. A lot of hardware resources as well as electricity is thereby wasted. So, instead of running many such physical computers that are only partially used, one can pack many virtual machines onto a few powerful hosts and balance the loads between them.
Supported OS: Windows XP, Server 2003, Server 2008, Windows 7, Server 2012, Windows 8 (32-bit and 64-bit).
Mac OS X hosts: 10.6 (Snow Leopard, 32-bit and 64-bit), 10.7 (Lion, 32-bit and 64-bit), 10.8 (Mountain Lion, 64-bit).
Linux hosts (32-bit and 64-bit): Ubuntu 8.04 (“Hardy Heron”), 8.10 (“Intrepid Ibex”), 9.04 (“Jaunty Jackalope”), 9.10 (“Karmic Koala”), 10.04 (“Lucid Lynx”), 10.10 (“Maverick Meerkat), 11.04 (“Natty Narwhal”), 11.10 (“Oneiric Oncelot”), 12.04 (“Precise Pangolin”), Debian GNU/Linux 5.0 (“lenny”) and 6.0 (“squeeze”), Oracle Enterprise Linux 4 and 5, Oracle Linux 6.
Changes in VirtualBox 4.2.6 (released 2012-12-19):
* VMM: don’t inject stale VT-x events to prevent crashes after VM reset (bug #11256)
* VMM: workaround for buggy BIOSes which enable MONITOR only for certain CPUs (bugs #9460, #10686)
* GUI: fixed trimming of anti-aliased text in details-view element headers (4.2.0 regression)
* GUI: fixed create-settings-file-alias functionality on Mac hosts (4.2.0 regression)
* GUI: fixed take-guest-screenshot functionality on Windows hosts (bug #11095)
* GUI: several minor fixes, including palette fixes (bug #11191)
* GUI: fixed Windows 2012 OS type (bug #11206)
* GUI: allow to terminate the VM even if VBoxSVC crashed
* API: fixed cancelling of snapshots, previously this could lead to inconsistent VM configs (bug #6877)
* API: fixed identifying disk images by UUID (bug #11209)
* 3D Support: several fixes
* VRDP: fixed occasional crash with external authentication (bug #11156)
* VGA: fix for double scan text modes
* USB: fixed invalid pending request count at the time of service of DEVICE POWER requests (Windows hosts only; bugs #10021, #11056)
* USB keyboard: Korean keyboard workaround (bug #11150)
* Storage: fixed hang with QCOW images and asynchronous I/O enabled
* Storage: fixed hang with newer VHD images (bug #11279)
* Storage: actually write the non-rotational flag to the VM settings (4.2.0 regression)
* Virtio-net: fixed the problem with network statistics counters in Session Information dialog (GUI)
* Metrics: introduced network rate and disk usage metrics
* Metrics: fixed a crash under certain conditions on Solaris hosts
* BIOS: fix for El Torito
* Shared Folders: if the host folder of a shared folder mapping does not exist, keep it active but mark it as invalid to prevent inconsitent saved states (bug #11147)
* VBoxManage: fixed converting disks from raw images
* VBoxManage: show snapshot description in the VM or snapshot information
* VBoxManage: make implicit opening of media consistent in all places dealing with media
* VBoxManage: the iSCSI initiator name was not stored in the settings file when doing storageattach (bug #11212)
* VBoxManage: metrics collect now properly handles ‘CPU/MHz’ and ‘Net/*/LinkSpeed’ metrics
* VBoxManage: changing the image UUID or parent UUID as part of storageattach works now in all safe cases
* VBoxManage: introduced storageattach –medium additions as a shortcut to mount the additions image (bug #11165)
* OVF: fixed importing OVF files cerated by recent VMware products (bug #10905)
* Linux hosts / Bridged Networking: fixed the problem with leaking connections in conntrack (bug #11178)
* Linux Additions: added support for ConsoleKit sessions in the vminfo service of VBoxService
* Linux Additions: don’t crash during remount under certain conditions (bug #11291)
* Linux/Solaris Additions: fixed guest memory metrics collection
* Solaris hosts: added a dependency to ensure that the user directories are reachable when starting VBox services
* Windows host installer: integrated user-contributed translations, thanks to all contributors!
* Windows Additions: fixed auto-logon installation for Windows 8
* Windows Additions: don’t fail if the shared folders host service is not available
* Windows Additions: fixed Guest Additions startup on Windows 2000 guests (bug #11253)
* Windows Additions: auto-resize fixes for Windows 8 guests
Homepage – http://www.virtualbox.org
Size: 92.1 MB
Remark: Freeware and silent install using swithes -s