A virtual machine is an emulation of a guest operating system, running on virtualized hardware within a host operating system.

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How can virtual machines consume so little RAM on the physical host machine?

I'm running VirtualBox on a Windows XP machine with 2GB RAM. I've created a virtual Ubuntu machine and allocated it a base memory of 750MB. Just to put it to a test, I ran 20 things at once on the ...
19
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5answers
31k views

VMware Workstation: how to reduce .vmdk maximum size

I have a 150 GB disk file (.vmdk, non pre-allocated) where my virtual machine is stored. The file is currently 20 GB, but it is growing everyday, even though I'm not storing anything new in the guest ...
17
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7answers
2k views

What's better a better VM app: VMWare, Parallels or Virtual PC [closed]

From a Windows developer's perspective, which VM application is the best? Why?
11
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1answer
11k views

shortcut to switch between virtual machine and host operating system?

okay so I have windows 8 and am running Lubuntu as a VM using vmplayer. I have my laptop hooked up to an external monitor so I have the VM full screen on my laptop and windows 8 on the monitor. What I ...
9
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3answers
18k views

How can I import an existing .vbox virtual machine in VirtualBox?

How can I import an existing .vbox virtual machine in VirtualBox? The instructions say I can only do this if I have an .ova or .ovf file, but I don't understand this as VirtualBox machines are .vbox ...
6
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1answer
3k views

Move an existing XP install into VMWare or Virtual PC

I have a computer that has a bunch of things on it that are pretty legacy. It's an old machine, but getting everything on it set up properly on another computer could take weeks, if it's even possible ...
5
votes
1answer
8k views

Virtual Box ssh not working on Virtual Box Ubuntu machine

I have Ubuntu 12.10 installed, and 12.04 Server set up in my virtual machine. My VM has internet access, and I can ping it from my host. ping symfony.dev # points to 192.168.56.101, and successful ...
5
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9answers
2k views

Running Linux inside Windows XP, ie no dual booting

What are the best options that allow running a Linux distribution, such as Ubuntu inside Windows XP, i.e. within a window? By "best" I mean quick startup time, low memory requirement, good graphical ...
4
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4answers
10k views

Is it possible to get a Virtualbox VM always start from same time, if so how?

I am trying to use VB to set up a Windows 7 VM for use in a training course. I want the virtual machine always to start up from the same conditions, in particular: The VM always starts at the same ...
10
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4answers
4k views

why does Virtualbox use 15-20% CPU when VM is paused?

I run VirtualBox 3.1 on Ubuntu with a Win XP guest. I have noticed to my surprise that when I pause the VM (its screen grays out) VirtualBox continues using 15-20% of the host's CPU. Is this normal ...
9
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9answers
18k views

How do I find the IP address of a virtual machine using VMware Fusion?

Can I determine the IP of a virtual machine using VMware Fusion without actually entering the operating system running on the virtual machine? I'm looking for a menu option, command line, or otherwise ...
9
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3answers
1k views

Can I make a virtual machine out of a Windows XP physical machine?

I would like to switch to Linux, but I need some stuff on my Windows XP install. I know that VMWare Workstation can convert a physical machine into a virtual machine, but it's $189. :-/ Are there ...
7
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3answers
31k 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 ...
6
votes
1answer
2k views

Quick and dirty user management service for Linux VMs?

Background I have a home server running Debian, and a workstation that runs various VirtualBox VMs (mostly Linuxen but some Windows). At the moment, I'm creating my main user account anew for every ...
4
votes
2answers
8k views

NAT Port Forwarding in VirtualBox

I have enabled two adapters in my VirtualBox (running Ubuntu 12.10 Server Edition), with types as: Host-only and NAT. My main motive is to be able to connect two VMs running on two different hosts ...
2
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1answer
1k views

Can't connect to Windows 10 VM on Azure after installing update

I have a Windows 10 VM on Azure, to which I connect using remote desktop. Today I installed the latest preview build on it, and now I can no longer connect using RDP: my credentials no longer work, ...
2
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2answers
1k views

Setting Hostname as IP on Linux for Hadoop VM

How can I have an Ubuntu server VM set /etc/hostname/ to the value fo the VM's assigned IP address automatically on startup? I'm creating an Ubuntu server VM image to run Hadoop. When a client ...
2
votes
3answers
5k views

Virtualbox: Raw linux partition not booting

I have a dual-boot laptop with Windows 7 and Ubuntu 12.04. I am trying to boot the ubuntu partition from windows using Virtualbox. I have successfully created the .vmdk, and created the virtual ...
10
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1answer
4k views

Oracle VirtualBox - Unable to update to Windows 10

I'm using Oracle VirtualBox 5 and my virtual Windows offered an Update to Windows 10 today, but it stops saying: VirtualBox Graphics Adapter The display manufacturer hasn't made your display ...
9
votes
1answer
5k views

VirtualBox Ubuntu VM doesn't automatically sync time with host even with Guest Additions installed

I'm running a Ubuntu VM with VirtualBox and I have both the dkms and virtualbox-guest-additions packages installed. I read in this answer that the system clock should sync with the host automatically ...
7
votes
6answers
4k views

Possible to have multiple virtual monitors for a VMware guest in windowed mode?

Using VMware Workstation 10 on Windows, I've read "Use Multiple Monitors for One Virtual Machine" and managed to make it work as described when running the machine in Full Screen mode. What I would ...
7
votes
4answers
8k views

Cannot create external switch on Hyper-V

I am getting the following error when creating an external switch on Hyper-V: I am running Windows 8.1 x64. My switch settings are as follows: Event viewer gives me the following errors in ...
6
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3answers
3k views

How can I cause a VirtualBox VM (running Ubuntu) to run a command upon resuming its state?

I am running a few Ubuntu VMs on a MacBook Pro host. Whenever I pause a VM or save its state to disk, the next time I restart it, the system clock goes out of sync. Is there a way for the VM to know ...
6
votes
3answers
3k views

VirtualBox: have higher guest resolution than host resolution

Is there any way to have a guest machine have a huge resolution (like 3000x2000 or something) in VirtualBox? I'd like to be able to move around the desktop by scrolling around. It seems like it would ...
5
votes
8answers
19k views

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 ...
4
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3answers
1k views

Minimal OS for running virtual machines

Is there a minimalistic operating system built purely for the purpose of running virtual machines (preferrably open source / otherwise free)? If not, let's say I decided to do something like Linux ...
4
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1answer
763 views

Is it possible to run several virtual machines each with independent mouse+keyboard on a single PC? [duplicate]

My goal is to instead of buying 4 separate basic PCs (plus the obvious peripherals), buy just one fast PC and the peripherals. I'm wondering if I can use a more powerful computer, say, one with core ...
3
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2answers
12k views

VT-x/AMD-V Work-Around For VirtualBox?

After converting a Parallels VM to VirtualBox, the converted VM still does not run. VirtualBox says: VT-x/AMD-V hardware acceleration has been enabled, but is not operational.... Please ensure ...
3
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2answers
1k views

Can I boot up into an existing virtual machine?

The situation: as a freelance developer, I need to work in a similar development environment to the other people on the project. Because the dev environment has so many dependencies and 3rd party ...
1
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3answers
3k views

Use existing Windows 7 installation with VirtualBox in Ubuntu 10.10

I have two operating systems: Windows 7 Professional and Ubuntu 10.10 (dual boot). I wish to use this existing Windows installation using VirtualBox in Ubuntu as well as use it in the native mode. ...
1
vote
3answers
6k views

How can I run an existing WinXP partition (dual boot machine) inside KVM?

I use KVM to run virtual machines on Ubuntu Jaunty and virt-manager to configure them. My machine is dual-boot, and I don't want to have to reboot for my occasional uses of Windows. So I set up a VM ...
10
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3answers
3k views

Virtual machines and TRIM

Although TRIM support was introduced to make SSD work better, it should also help virtual machines optimizing virtual disks (for example to know which parts of virtual disks needs no storage on ...
10
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4answers
8k views

How do I stop VMware player from resizing?

I just downloaded VMware player (I used to use Virtual Box, but I needed Windows Aero, and vbox doesn't support that yet) But it will automatically resize the guest when I resize the window, and I do ...
8
votes
5answers
73k views

How do you copy a file from Windows to a VMware virtual hard disk (Ubuntu)?

I have VMware Player, and I run Ubuntu with it on my Windows 7 system. Now I want to copy some files from my Windows folders into the VMware virtual hard disk, so that I can view these files on ...
7
votes
11answers
85k views

How to copy files from local machine to remote virtual machine?

Is there an easy way I can copy files directly from my machine to the virtual machine? I have downloaded a lot of .HTML files on my desktop and I need them on the virtual machine, I noticed that I ...
6
votes
2answers
9k views

Converting a Windows 2000 Physical Machine to a Virtual Machine

What's the best way to create a virtual machine from an old Windows 2000 machine? I found VMware vCenter Converter Standalone 4.0.1 which is the last version to support Windows 2000. Are there any ...
6
votes
2answers
24k views

How can I mount an external hard drive in a VirtualBox machine

I have installed Virtual Box on Machine and setup a Ubuntu 9.10 machine. And I have an external hard drive formatted for linux. But when I hook up the external hard drive, my ubuntu 9.10 can't see ...
5
votes
5answers
1k views

Run a dual-boot operative system virtually

I have a dual-boot system with Windows 7 and Ubuntu 11.10 installed on separate partitions, according to the following partitioning scheme: 1. MBR for windows 2. Windows system partition (NTFS) - ...
4
votes
2answers
1k views

Unable to ssh to a Linux VM after a day

I have a machine running 4 VMs on it. There is one Fedora VM which is causing me some trouble. The IPs of the VMs are something like 10.100.100.* I have a Windows PC which is in the same network. It ...
3
votes
3answers
2k views

Quad Core host with hyper-threading, how many processors to configure in VirtualBox?

I have a quad-core i7 processor with hyperthreading (8 logical cores), when I configured a virtual machine to use 8 processors, VirtualBox gave me a warning saying that I only have four cores (which ...
3
votes
1answer
84 views

Special instructions for CentOS VBox virtual machine?

I am gearing up to create a CentOS 5.5 server virtual machine in VBox and was wondering if there are special instructions, configurations or settings that I should be aware of ahead of time. ...
3
votes
1answer
1k views

Dual boot Linux / Windows 7 + Window 7 virtual machine under Linux + licensing

Is it legal to use single Windows 7 (home basic) license to install windows on host AND on virtual machine running under Linux on the same host? It will be physically different installations ...
3
votes
1answer
587 views

Creating Ubuntu VM with VirtualBox

I am trying to set up my very first virtual machine via VirtualBox (4.1.8). I created the machine and selected Linux → Ubuntu inside VBox's installation wizard. I then went to run the machine for the ...
3
votes
2answers
11k views

How can I shrink my VMware image?

I created an image of a Windows Server 2008 system using the free VMware Player and set the maximum hard drive size to 100GB. I then gave those image files - 30GB at the time - to a server hosting ...
2
votes
1answer
146 views

Pages appearing in black on Firefox Developer Edition

I just installed the latest Firefox Developer's Edition (40.0a2) on one of my VMs, and most web pages are showing up on it (images included) as one big black page of nothing. (It works fine on my host ...
2
votes
1answer
2k views

How to connect to wifi using Windows 8.1 preview in a Oracle VM VirtualBox virtual pc

I've been thinking about upgrading to Windows 8.1 but wanted to test it first in a virtual pc I made using Oracle VM VirtualBox. I downloaded the Windows 8.1 preview software and so far it works well. ...
2
votes
1answer
346 views

Running an executable in virtual machine through base machine

I want to launch an executable in my virtual machine(Windows Server 2003 OS and is installed using VMWARE Workstation) from my base machine I tried the following command "C:\Program ...
2
votes
5answers
6k views

Time machine friendly virtual machine (VirtualBox) image files?

I have a Windows 7 VirtualBox virtual machine. The disk image file is 30GB and is one large .vdi file. If I change anything inside that (even a few KBs), Time Machine wants to backup the entire 30GB ...
2
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1answer
1k views

How do i set up shared folders in virtual box (windows 7 host, Ubuntu guest)?

I have windows 7 (host), virtual box, and BioLinux6 (a varient of Ubuntu) as the guest OS. how can i set up the shared folders to be usable for read and write in both OS without having to re-mount ...
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4answers
5k views

Can I use the same Windows 7 license for a virtual machine and native (on the same computer)?

I run OS X as my usual operating system. I've purchased a copy of Windows 7 which I've installed as a guest in VMware Fusion. Everything's fine so far. Now -- I'd like to also have a native ...