VirtualBox is a free, open source virtualization program from Oracle for the x86/x86_64 architectures.

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VirtualBox: 4 serial ports

Is there any way in virtual box to have more than 2 serial ports? When I try to set a 3rd or 4th serial port I get "Argument slot is invalid. RT_ELEMENTS(mSerialPorts))". The documentation claims it ...
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virtual box stuck at “starting virtual machine” 0%

After upgrading to virtualbox 4.2.16 all of my VMs get stuck at launch. I tried downgrading to 4.1.26, but I still get the same problem. Screenshots: (not enough rep to post images) When I ...
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4answers
815 views

What is a good (free) VM solution for windows 7

The obvious candidates are Virtualbox and Virtual PC. But I have not been paying attention to VM's the last year, have I missed a good alternative?
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Windows Virtual Machines will not run

I'm trying to setup a few virtual machines to use for testing websites in the various old versions of IE. I had Microsoft Virtual PC working on an older machine using XP mode and 2 other VHD's from ...
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2answers
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How to input hash (#) symbol to terminal?

I'm running Ubuntu Server as a virtual machine (using VirtualBox) on my mac. Normally on the Mac, I'd press alt + 3 to input the hash (#) sybmol. However, if I do this in my Ubuntu Server's console, ...
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Fixing a guest screen resolution in VirtualBox

I was required to develop a Windows app UI for a fixed resolution - it doesn't matter if it makes sense or not, the customer requires it. I'm using a Windows Server 2003 VirtualBox VM as the ...
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VirtualBox: Set Network Adaptor for exclusive use of Guest VM

In a previous question I asked how to configure m0n0wall in a VM. Now I would like to set a network addaptor in my machine to be used for the guest VM only, that is, not allow any traffic from the ...
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Run Windows inside a virtual machine on Linux for gaming

Since making the full time move to using Linux (Fedora) from Windows, I've found the migration fairly easy and haven't had much disruption in how I do my work. However, there are some games I like to ...
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What would be optimal settings for a Windows 7 VirtualBox VM running on a Macbook Pro?

I am having a hard time coming up with decent performing settings to run my Win7 64-bit VirtualBox VM on my brand new Macbook pro. I've given it 2G memory (out of my 8G total), tried what feels like ...
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3answers
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apt-get behind proxy on VirtualBox Ubuntu

how can I set apt-get to work behind proxy?
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4answers
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auto-mounting shared folders in VirtualBox

I am writing to ask what the effect of the auto-mounting process is in VirtualBox, and where the folders can be accessed within a guest Linux system if auto-mount is used. I have VirtualBox 4.0.4 ...
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5answers
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How to recover Virtual Machines in Virtualbox?

For some reason, all of a sudden, all virtual machines are gone from the User Interface in virtual box. I suspect CCleaner has something to do with it, but that's not the point. Both the virtual ...
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Doesn't VirtualBox 4.0 support drag-drop file copy yet?

Version 4.0.0 will be new major release. The following major new features were added: -New settings/disk file layout for VM portability; see the manual for more information. -Open ...
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Where can I find Amazon Linux AMI Image for VirtualBox?

I'm trying to learn AWS and because I'm some familiar with Linux, I think the best way to learn is to get Amazon Linux AMI right into VirtualBox software and play with it. I see the latest Amazon ...
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3answers
15k views

How do you enable multi-core virtualization in Windows 8 Pro?

I've just got a new Dell Vostro 470 with a quad core (8 threads) i7 3770 and I'm trying to run virtual machines on it, which works fine, except if I want to assign multiple cores to a VM. I've checked ...
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3answers
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Virtual Box Virtual Disk not expanding

I have an iMac Core i5 host computer, 1TB Hard drive, 8GB Memory. I have created a Virtual Box VM to run Fedora 14 64bit with a 200 GB Dynamically allocated hard drive. Virtual Box version 4.1.6 ...
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Convert Parallels VM to Virtual Box VM?

The question describes well what I need but here are some more details about the circumstances. With Parallels Desktop 4 running under Linux, I have a number of Windows 7 Virtual Machines. Sadly, ...
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3answers
18k views

How to access my local server on my VirtualBox virtual machine?

Here's my setup: I have a local server running on my machine (Mac OS, Snow Leopard). I can access it via my browser by doing localhost:3000 I have a virtual machine using Virtual Box running a ...
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Virtualbox 4.2.10 Auto resize not working. Will auto-resize down but not up unless in full screen

Using Virtualbox 4.2.10 with Windows 7 as host and guest. If I press Ctrl+F, the OS goes full screen. If I check the resolution, it says 1680×1050 -- same size as my host OS that has many ...
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1answer
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How to convert .img to usable VirtualBox format

I have a .img file for Windows 1, and I need to turn it into something which I can use in VirtualBox, such as an ISO, or turning it into a bootable virtual disk for an ICT project. If you need any ...
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2answers
743 views

How to reduce VM size?

I have a Virtualbox VM, with a .vdi that is taking 49gb in the host machine. I may have used that much space inside the VM once, but now I'm only really using about 6gb. I tried this command for ...
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2answers
1k views

Use VirtualBox to access site on host from guest?

I'm running VirtualBox on a Mac (host), the VM i'm using is windows 7 (guest). VirtualBox is setup to use the NAT network adapter, and I'm able to get to the internet just fine (google, msn, ...
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2answers
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How do I trap the mouse pointer within a VirtualBox Guest OS?

I'm on a Mac Mini 2011 with VirtualBox installed. I have Windows 7 running as a Guest OS. My question: How do I "trap" my mouse pointer within Windows? In other words, I don't want my mouse to move ...
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using ubuntu-server in full screen mode - VirtualBox

I have installed ubuntu-server 11.10 in virtual box. but unfortunately the screen is small. I installed VirtualBox guest additions to see it full screen(like what I do for windows). Now it is ...
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Is it possible to export a VirtualBox drive to a “real” hard drive?

I have a Windows 7 VM on my Mac OS X VirtualBox Host. The virtual drive is a dynamically-expanding with a limit of 20GB. Is it possible to export the .vdi virtual hard drive to a real, physical hard ...
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If I have a .vhd file, can it be used by Virtual PC 2007, VirtualBox, and Windows 7's Virtual PC?

If I have a .vhd file, can it be used by Virtual PC 2007, VirtualBox (open source), and Windows 7's Virtual PC (the newest Virtual PC)? Can you even run Virtual PC 2007 on a .vhd file, and then shut ...
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VirtualBox - guest Ubuntu loses DNS when host connects to VPN

I have Ubuntu guest OS in VirtualBox using default NAT for eth0. Works fine at the office and at home EXCEPT when on office VPN from home. When the host OS (Windows 7) is connected to the VPN, DNS ...
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2answers
14k views

mount gives unknown filesystem type 'vboxsf'

I'm getting an error message mount: unknown filesystem type 'vboxsf' when trying to mount a shared folder on my guest Ubuntu machine. I have a Windows 7 machine running 4.1.22V Oracle VM VirtualBox. ...
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2answers
741 views

Why do some applications run faster on a 32-bit guest VM than on the 64-bit host machine?

I have a Windows 7 x64 laptop with a Windows XP x32 guest virtual machine installed using VirtualBox. Once I ran an app on the guest and found that it ran noticeably faster than it did on the host. ...
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2answers
623 views

What is the Smallest Possible Size of WinXP SP3 with IE8

I tried to remove all known junks from the window dir e.g. $NTUninstall..., temp files, etc and setting no pagefile. But I still got around 4GB usage in c: after fresh installation of the windows(my ...
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6answers
925 views

Cutting Ubuntu to the bone for Virtualbox VM

I've been looking around for a Linux variant which will install only the software I need rather than everything Ubuntu (for example) puts in by default. This is to create a virtual machine in ...
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How to turn a Windows XP partition into a VirtualBox virtual machine?

How can I turn a hard drive with XP into a VirtualBox virtual machine?
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Using VirtualBox USB capabilities

Using the USB capabilities of the VirtualBox, I've tried in tried different computers and just keep receiving the message that the USB device is busy with a previous request. I'm trying to access the ...
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2answers
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Vagrant Private Network IPs not working, but DHCP does

I have a vagrant config file with three VMs configured in it. All are identical except on has a static IP and the other two are on DHCP. The two which are assigned IPs by DHCP can talk to each other ...
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1answer
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VirtualBox - reduce max-size of dynamic .vdi hard disk

I'm trying to reduce the maximum capacity of a .vdi file (hard disk) for one of my VMs. I set it as dynamically-allocated with a maximum capacity of 25GB. I want to reduce this to 10GB. NOTE: I do ...
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1answer
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Headless VBox - VRDE not working

I have imported an existing machine on a freshly installed VirtualBox 4.1.6r74727, running on a Ubuntu Server 10.04 box. The guest OS is Windows Server 2003. Further, I have modified the VM as ...
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1answer
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How to enable VT-X when its hidden in BIOS

I have a Gateway LX6810-01 with a Intel Core TM2 Quad CPU Q8200 processor. I would like to enable VT-X so I can have 64 bit virutalization but the BIOS has hidden the option. I checked for a BIOS ...
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Virtualbox: get host IP address

How can one get host IP address from within vbox virtual machine? I'm trying to clone repository running on the host, so I need an address to perform hg clone.
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Kernel panic booting CentOS 5 image in VirtualBox

I'm using VirtualBox, and have a vdi. It works fine on the virtual machine I originally configured for it, but if I clone it (with VBoxManage clonehd) or just copy it, create a new VM and boot it, I ...
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1answer
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Remove Virtualbox's lower machine configuration bar in a running VM?

I'm running a VM in VirtualBox 3.2.4 in Full Screen. At the bottom of my screen, there's a small toolbar from Virtualbox. When I'm using my mouse to change windows, sometimes this toolbar pops-up and ...
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1answer
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Why can't I chown a VirtualBox shared directory?

I'm trying to recursively chown a VirtualBox shared folder, but I can't get it to work: $ ls -lah total 16K drwxr-xr-x 4 root root 4.0K Aug 1 2012 . drwxr-xr-x 23 root root 4.0K Jul 21 2012 ...
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In VirtualBox, how can I access host localhost from guest (Visual Studio Dev Server from IE7 testing VM)?

Host OS is Win7 running MyApp in the Visual Studio Development Server, bound to localhost:51227, VM is VirtualBox configured with NAT. Guest OS is Win XP with IE7 installed. My goal is to debug MyApp ...
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4answers
873 views

Shared clipboard in Virtualbox with command line only Debian guest

I have a Debian guest installed on a Windows 7 host using Virtualbox. The installation included virtualbox-ose-guest-utils by default, so I should have everything I need. How can I turn on the shared ...
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2answers
12k views

Does QEMU's performance (still) lag VirtualBox's and is there a way to improve it without the hardware support+kvm kernel module?

I've noticed several articles that have claimed that QEMU is slower than VirtualBox (without hardware assistance) but several are years old, and the newest seemed to be from last year. Is it true ...
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Is running a Windows 7 VM on an SSD a bad idea?

I'm using VirtualBox to run a 64-bit Windows 7 VM, with the guest drive being on an SSD for speed. Host OS is also 64-bit Windows 7. I know Windows 7 automagically tweaks some settings if it detects ...
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3answers
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Installing an operating system to a USB drive and booting to it - all within VirtualBox

Is it possible to install an operating system onto a USB drive, and then boot to it, all within VirtualBox? Not like putting the virtual disk on the USB drive. Installing the entire OS there so it can ...
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315 views

Recommended FS to share Windows, OS X host and Linux

I have a 120GB SD hard drive that I have put into an Oker portable USB enclosure it comes with two USB output presumably one is redundant just to get extra power. I regularly use 3 host computers: ...
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2answers
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How can I get mouse capture to work in virtualbox when I move guest window to second monitor?

I'm running VirtualBox on a Win7 host. Guest OS is Centos. My setup is a laptop (screen 1) with a huge external monitor (screen 2). I'm only telling Centos there is one monitor though. When I ...
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1answer
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exporting a virtualbox VDI to a harddrive to boot it natively

I have a VirtualBox 3.1.2 image of Debian 5.0.2 running on Windows XP SP3. I would like to export that Debian image to a USB harddrive such that I could boot to that drive and run it natively. Is that ...
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3answers
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Compiz gone with Ubuntu 10.10 upgrade on VirtualBox Win7-64 host

I just upgraded my Linux guest running on Win7-64 VirtualBox 3.2.10 from Ubuntu 10.04 to 10.10. I followed the usual steps to reapply guest additions, including installing build-essential and ...