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Questions tagged [virtual-machine]

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

37 votes
2 answers
94k views

Start a VM in VirtualBox without GUI [duplicate]

I'm using Oracle VirtualBox to run a CentOS7 VM. I then normally ssh into the VM and do all work through my terminal. Thus I don't really need the GUI and I'd like to disable it to improve performance....
SergeyOvchinnik's user avatar
37 votes
1 answer
113k views

How do I install and use Windows Virtual PC in Windows 8?

I really liked the integrated Virtual Machine that Windows had built-in with Windows 7, known as the Windows Virtual PC. I'm looking to install that again. I'd like to be able to install multiple ...
James Mertz's user avatar
  • 26.4k
36 votes
5 answers
82k views

How do I convert a VDI HDD to a VHD file?

Is there a way to convert a VDI HDD to a VHD?
IT_07's user avatar
  • 544
35 votes
4 answers
100k views

Virtual box is not working on windows 10

I have installed virtual box But when I tried to run it. It shows me an error as: I have been trying everything for whole day. Like there are answers related to this question as: VT-x is not ...
Himanshu's user avatar
  • 761
34 votes
4 answers
111k views

Change MacOS X guest screen resolution for VirtualBox

I have tried all alternatives and resources that I found on internet to achieve to change screen resolution in my MacOS X guest. I have the latest VirtualBox version (4.1.22) and I have MacOS X 10.6.3 ...
Pymoo's user avatar
  • 343
33 votes
2 answers
6k views

What does selecting an OS in VirtualBox actually do?

In the setup process for a new virtual machine, VirtualBox presents several different OS types and versions to choose from: I'm curious as to what VirtualBox actually does when you select an OS. I'm ...
nc4pk's user avatar
  • 9,157
32 votes
3 answers
73k views

libvirt: "Failed to initialize a valid firewall backend"

I'm trying to set up a virtual NAT network device without DHCP for libvirt on an Arch Linux host. What I have tried: # virsh net-define network.xml Network default defined from network.xml [...
testandby's user avatar
  • 429
32 votes
9 answers
63k views

Limiting CPU speed in a virtual machine?

Does anyone know of a way to limit the CPU speed in a virtual machine? Or if there is even a virtualization software that allows you to do this? I am trying to find the minimum requirements for a ...
RCC's user avatar
  • 321
32 votes
4 answers
182k views

Virtual Machine (VirtualBox) -- How to access files from the hosting machine?

I have a PC with Windows 7 Ultimate (A) running on it. From within that OS I have VirtualBox running another Windows 7 instance (B). Is there any way for the Windows 7 (B) to access files from ...
myermian's user avatar
  • 1,297
32 votes
3 answers
25k views

VirtualBox and SSD's TRIM command support

I am aware of the huge number of posts on the internet saying that this would not work and why and I really spent days looking for the solutions months ago but I've found yesterday some tips how to "...
Krzysztof Szynter's user avatar
32 votes
7 answers
47k views

Virtualbox Windows graceful shutdown of guests on host shutdown

I am trying to find a solution to gracefully shutdown any guest VMs running under VirtualBox Windows when the host computer is shut down or restarted. It seems that the safest option would be to ...
Matt Jenkins's user avatar
32 votes
2 answers
18k views

How to run a minimal Linux inside a running 64-bit Windows 7

On my previous Windows Vista laptop, I used to run Portable Ubuntu Remix for Windows, which is based on coLinux, like the similar andLinux. This worked fairly well with limited system resources (a ...
Ingo Karkat's user avatar
  • 23.2k
31 votes
5 answers
90k views

Change screen resolution of Ubuntu VM in Hyper-V

Last night I was attempting to set up a Ubuntu VM on my device using Hyper-V. I had no problems with creating the VM, nor getting OS installed inside it and booted (apart from I incorrectly chose ...
Larnu's user avatar
  • 445
31 votes
7 answers
9k views

Is it possible to "virtualize" an existing PC?

I'm running Ubuntu Desktop 12.04, and I was wondering if it was possible to somehow take my whole filesystem (everything under /) and create an ISO from it. Then, perhaps, use that ISO as the file ...
pnongrata's user avatar
  • 2,852
30 votes
4 answers
75k views

which file type to install my virtual hard disk in while installing a new machine on virtualbox?

I got some options like VHD, VMDK, HDD, and VDI is there a file type that is most commonly used and is supported by most other virtual disk software?
MozenRath's user avatar
  • 417

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