A virtual machine (VM) is a guest Operating System running in a completely isolated environment within a normal host operating system. Modern virtual machines are implemented with either software emulation or hardware virtualization or (in most cases) both together.

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Preparing a Ubuntu install for sharing

I have a virtual version of Ubuntu running in VirtualBox. Currently I have lots of personal information in it. I want to share the virtual image disk with other developers, but I don't want them to be ...
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27 views

Can't login after editing /etc/security/limits.conf

After edited the /etc/security/limits.conf file to set the nofile parameter to unlimited, server got hanged . Can't login in via ssh. Tried to take console, issue with console. Will reboot of the VM ...
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16 views

Guest OS resolution (text too small) in vmware workstation 12 player

I have a windows 10 host OS where I have installed vmware workstation 12 player. I have an Xubuntu as a guest OS (virtual machine). The complication is: the text is too small in guest OS and almost ...
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1answer
370 views

Migrate a qcow2 image between storage pools

I have 2 storage pools. host_images (directory storage pool) remote_images (nfs storage pool) How do I copy qcow images from remote_images to host_images using libvirt APIs? I've tried using the ...
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2answers
130 views

Accidentally removed a libvirt image file, can I recreate it?

I accidentally removed the wrong image file in my /var/lib/libvirt/images directory. I'm not sure how to recreate one or to undo my removal. Any hints?
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Virtual to Cloud Migration [on hold]

I have been assigned a task for the migration of Virtual Servers (Linux) to Cloud environment . Wanted to ask is V2C different from V2V migration. I am talking about RHEL 6 Servers hosted over an ESX ....
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16 views

VirtualBox Host - Ram Question - Mem Free Vs Mem Available - Possible Mem Leak?

I'm wondering if our system has lots of free RAM, or if its almost out. I read here regarding MemAvailable but I am wondering how it applies to VirtualBox as I am sure thats the reason the numbers I ...
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1answer
21 views

Clone disk of a running VM and run it on VirtualBox

I'm in the following situation: I need to "clone" the disks (sda, sdb) of a running CentOS VM over SSH (i did this step by following this guide) and deploy them on something like VirtualBox. I tried,...
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1answer
18 views

Why is it taking so long to establish a LAN connection on boot?

I have an issue with a virtual machine taking time to connect to the local network on boot. I create a virtual machine using the following command: virt-install \ --connect qemu:///system \ -...
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21 views

Not sure which audio device to pass through via OVMF

I'm configuring a VGA passthrough on Arch for a virtual Windows machine, and when I use lspci | grep Audio, I get two different devices with different PCI IDs. They look very similar, and I'm not sure ...
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31 views

Is there a more efficient way of defragmenting Linux memory other than rebooting?

I am running Gentoo Linux with kernel 4.4.8-hardened-r1, QEMU-KVM version 2.5.1 and 3227 MB of system-visible RAM (without considering RAM taken by BIOS and my AMD APU's graphics). I have a VM that ...
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5answers
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Convert image of a partition into image of a disk with partition table

I have an image of an existing partition generated with dd if=/dev/sdXN of=image.bin. Now I want to use this image as the basis for a virtual machine. I know how to convert the image into a format ...
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1answer
2k views

VirtualBox guest cannot connect to USB drive, why not?

I have VirtualBox installed in Windows 8.1 and I am using it to launch and use CentOS 7 within VirtualBox. When I connect a USB drive to the computer, and right click over the icon circled in the ...
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0answers
16 views

Fedora Host, Kali VM, KVM/QEMU mouse not working

I have a Fedora 23 host, and I tried to install Kali Linux using Virtual Machine Manager, and every time I did it -- no matter how I configured it -- the mouse would not work. It would only go down ...
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0answers
20 views

Is there a way to make faster QEMU snapshots without using libvirt?

I have a Lenovo ThinkPad T430 running Red Hat Enterprise Linux 6.7, kernel 2.6.32 and QEMU-KVM 0.12.1 (per corporate policy I am not allowed to run a more cutting-edge distribution or any more recent ...
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0answers
51 views

Windows 10 vs. Mac OS as a hypervisor [closed]

I am a developer working with GNU/Linux. However I am required by my workplace to have either a Macbook running OSX, or an a Lenovo running Windows 10 as my work-station. The sole use for those will ...
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2answers
2k views

Measuring CPU %steal on VMware and Hyper-V hypervisors

For Xen Linux guests, %steal time is readily available via top and other utilities. Is it possible to get this and related metrics from within a Linux guest when running a non-Xen hypervisor such as ...
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29 views

QEMU/KVM: USB3 passthrough to FreeBSD

I'm making my first steps in FreeBSD, so please excuse any possible "linuxism". My goal is to run FreeBSD 10.2 inside virtual machine with QEMU/KVM and allow USB3 network card passthrough from the ...
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1answer
81 views

Forward code.domain.com to specific server?

I have the classic Multiple Servers 1 IP trouble Except I am using ESXi (s1) to host to Server VMs (VM1, VM2). What I'm trying to accomplish is this: When Someone Goes to mydomain.com they get S1-VM1 ...
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2answers
101 views

How do I compile my Gentoo kernel for AMD IOMMU?

I have an AMD A4-5300 CPU with a motherboard that supports IOMMU and I am trying to enable IOMMU on my Gentoo Hardened 4.3.3-r4 kernel with the intention of using a graphics card on a KVM VM. ...
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2answers
1k views

Linux guest VM on mac host - Keyboard

I use a Mac as a development box, but am slowly transitioning to Linux. So I am spending the majority of my time in the Linux guest VM while working. But I still spend a fair amount of time in Mac ...
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46 views

Enable “kvm=off”, “x-vga=on” and “-vga=none” from within Virt-Manager?

I have virtual machine created from Virt-manager, it's Windows. I have attached host PCI device (GPU) to the guest VM, it's recognized, but not used I know options x-vga=on and -vga=none are friends ...
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1answer
3k views

GParted LiveCD fails to start

I have a VM setup in VirtualBox (LinuxMint 17.1). But I'm trying to boot to GParted so I can resize a partition. I'm using gparted-live-0.22.0-2-amd64.iso and it boots correctly. I've tried every ...
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1answer
39 views

How to configure internet on old linux VM

I have downloaded the first version of Mendrake running kernel 2.0.35 for study purposes. I installed the system on a virtual machine (VirtualBox), i used SCSI virtual hard drive for compatibility &...
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1k views

Copy& Paste Fedora and Virtualbox CentOS7

I want copy text from Fedora 21 and paste to Virtual box with CentOS 7 how can I do that?? I change in Virtual box settings Shared Clipboard and Drag'n'Drop to bidirectional Thanks for help, ...
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33 views

Access tomcat server on a virtual machine

I'm having this problem, I think it's a very basic problem, many things sound similar, but still I couldn't find the answer: My laptop has windows 10, I install VM Ware and created a virtual machine, ...
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3answers
3k views

Having issues installing Kali Linux in Virtualbox

Trying to install Kali Linux in VB and it freezes. I believe I have the correct version and a good ISO because it comes up and allows me to navigate to "install" Once I press enter, all that happens ...
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1answer
36 views

Is it possible to p2v a standalone linux system for VMware workstation?

I have a Linux (Fedora 23) box which has among other things VMware workstation installed. I'd like to create a virtual clone of the physical Linux box, so I can run it in VMware workstation in order ...
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2answers
51 views

libvirt: command to start up all guest virtual machines which have auto-start enabled

I'm using Debian Jessie as a virtual machine host using libvirt/qemu/kvm. I've set some of the guest virtual machines to automatically start when the host OS boots up, this is working fine. For ...
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1answer
26 views

Install Linux to SSD or HDD for virtualizing Windows with QEMU?

In my PC I have 1 TB slow HDD and 120 GB fast SSD. I am curious which one of my drives should be used for Ubuntu installation. I plan to use Windows without dual-boot - by virtualizing it with QEMU (...
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177 views

Is it possible to install Xen on a computer (processor supports virtualization) alongside Ubuntu and Windows?

The computer currently triple boots Ubuntu and a couple of Windows versions. Now I want to add Xen into the mix. Would it work if I simply made a new partition for Xen, or does it need to take over ...
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1answer
2k views

Problem runing vmPlayer on fedora 21

After install the program and execute vmPlayer request the kernel headers to recompile it (I guess), after that vmP install the virtual network device, at this point show an error. and the vmware-...
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1answer
31 views

Share a folder between Linux host and Windows guest VM

I'm trying to share a folder between my main OS (openSUSE 42.1) to a guest Windows 7 virtual machine, but I'm unable to set it up properly. I access the VM from virt-manager, and I've read that the ...
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0answers
15 views

PCI passthrough device memory access incorrect

I have a wrlinux yocto system running on Intel Haswell processor. Here we pass through a PCIe device(broadcom switch) to VM launched using qemu/kvm. The Guest is able to detect the device via config ...
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1answer
31 views

Proxmox hook for VMs

We have Proxmox installation. We want to execute a command after new VM was added. It is required for QEMU port redirection since setting redir option is not avaialble on GUI: qm set 102 -args "--...
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1answer
5k views

setup kvm on a wireless interface on a laptop machine

I am trying to setup KVM in ubuntu 14.04 host machine. I use a wireless interface to access the internet in my machine. I have setup the wireless interface in my /etc/networks/interfaces as below. ...
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23 views

Converting A Physical Ubuntu Server with boot raid 1 to a Xen domu

So here's the situation: 1 physical server running a very outdated version of ubuntu 14.04 Booting off of a a software raid 1 configured in the installation. This server runs mission critical ...
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38 views

Virtual Machine failover with KVM [closed]

I'm trying failover of VM's in KVM Linux as a learning program. Scenario: 2 HV Bare metal (2 physical servers) having CentOS with KVM. On both the HV there are multiple web-server with guest ...
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3answers
3k views

Is there a convenient small Unix virtual machine I can install as an Android app?

Ubuntu for Android seems to be missing in action. I'm travelling tomorrow and I need to take a basic Linux machine with me. I'd rather just take my tablet than a laptop. So is there a reasonable ...
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1answer
21 views

Moving VirtualBox disks to cloud services

Currently, the official way of deploying a custom distribution or different operating system on Linode is installing it locally in a virtual machine and copying the resulting disk verbatim to a Linode ...
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25 views

Install CentOS 6.2 GUI with XenServer 6.5

This is my first time to use XenServer 6.5. I want to add a CentOS 6.2 Virtual Machine into my XenServer. I put the CentOS 6.2 iso and added > vnc in boot parameter. Below are the screenshot: After ...
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1answer
564 views

Getting an already installed Android x86 partition to run on KVM

(Originally posted on SuperUser here, but posted here due to lack of responses.) I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set root='(hd0,...
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1answer
292 views

fstab doesn't mount after boot of a virtual machine

I created virtual machine out of WordPress turnkey appliance (I believe it's based on Ubuntu) inside Virtual Box. I am able to mount a folder on turnkey from the host (Windows7) manually. So I added ...
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1answer
61 views

Can't Compile Hyperion1.2 with g++ Ming Compiler

Hey all I'm trying to compile Hyperion 1.2 and am getting errors. Here is the command I am using: x86_64-w64-mingw32-g++ Hyperion-1.2/Src/Crypter/hyperion.cpp -o Hyperion.exe And here is a ...
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1answer
2k views

One host, two virtual machines that cannot ping each other. How to solve

We have Virtual Machines operating within the KVM environment. We setup one as a dev server running Apache etc., and the other as a Windows development environment. The two environments are setup ...
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2answers
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Proper way distribute several scientific experiments across multiple servers?

In case I have 8 powerful machines, what is the proper way to distribute and balance the load from user applications and scientific experiments? Is virtualization right way to go, or is there any ...
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34 views

VMware Mac OS X 10.11 on Ubuntu Shared Connection Problem

I've just installed Mac OS X El Capitan 10.11 on my Ubuntu host pc and I cannot connect to the Internet, when I go to settings in Mac OS it just displays no ethernet connection is found. How can I ...
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0answers
27 views

FreeBSD display resolution under Veertu

I'm trying to set up FreeBSD 10.3 under Veertu. When starting X, the largest resolution I can get is 1280x720 (well, I can select 1280x768, but then I have to scroll). My actual screen is much bigger ...
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1answer
392 views

vmxnet3 multiqueue support in vmware workstation

I'm working on an application based on RSS multiqueue(receive side scaling), and testing it on vmware workstation, but found that vmxnet3 nic have problem with RSS. My linux virtual machine has 4 ...