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Questions tagged [virtual-machine]

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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878 views

How to share files between Windows host and Linux guest in VirtualBox, preserving RW-Flag of files?

I have a Windows host system, running an Ubuntu Linux guest. I have set up a shared folder, which uses the vboxsf filesystem. The RW-Flag of Windows files does not map to the Linux guest though. ...
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GUI window stuck after virtual machine killed

I use VirtualBox to run a number of background VMs, using the "Detachable Start" mode and then using "Show" to attach a GUI on the occasions when I need one. In this instance, the VM was in trouble, ...
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1answer
1k views

How to get better 2D graphics performance with Android-x86 running on KVM?

I'm running Android-x86 in QEMU/KVM by means of Virtual Machine Manager. This is a virtual machine I previously ran from a Windows host with VMWare. I managed to run it in Linux QEMU/KVM for now, but ...
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Virtualbox: Using existing .vdi to create new machine to access old data?

I backed up my .vdi files of some Ubuntu VMs and wanted to restore to a new computer. I thought that by using existing vdi files, I would be able to create a new VM or import it somehow to recreate ...
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1answer
760 views

distribute the JVM across a cluster of machines

Grasping at straws for search parameters and terminology. The key attribute to the JVM is the V for virtual (at least within the context of this question). How do you span a JVM across a cluster of ...
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1answer
21 views

How does the BIOS work in a Xen virtualized environment?

On a physical machine, the BIOS is located on a chip that sits on the motherboard. How does with work in a Xen virtual environment? Any links to documentation/articles will be appreciated.
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1answer
2k views

How can I manually trigger the virtio balloon driver on a guest?

I would like a certain Linux guest running in QEMU to release memory before the host is under memory pressure. How can I manually trigger the virtio balloon driver on a guest so that it releases as ...
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24 views

Installing hypervisor or emulator on OpenSolaris

what are the best options for installing hypervisor or emulator for an enterprise solution virtualization use on OpenSolaris?
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How do I create Ubuntu template on Qubes OS? [closed]

I want Qubes OS to create Ubuntu VM in the environment. I saw this site https://www.qubes-os.org/doc/qubes-iso-building/, "Build Environment" is all done. But I do not know what to do from there.
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1answer
1k views

Increase virtual HDD space on VMWare for Ubuntu

I am having an issue following instructions on how to increase from here. I cannot get the unallocated space to merge with the sda1, no matter what I try. I allocate the 30GB, then try it that way, ...
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1answer
23 views

Ubuntu Virtual Machine File Sharing — Mounting

I am running Windows 10 as my host OS, using Oracle VM VirtualBox Manager 6.0.8 as my virtual machine software, and Ubuntu 18.04.2 is my guest OS. I am trying to set up folder and file sharing. I ...
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5answers
9k 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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0answers
226 views

Linux Mint 18.3 upgraded to 19 - Screen now distorts with open-vm-tools-desktop

Except this singular issue, everything works wonderfully. I already tried apt-get purge open-vm-tools open-vm-tools-desktop but it didn't help. This is what I'm seeing after upgrading. The Y ...
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0answers
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Hosting LXC Linux containers in Azure

We have a number of LXC Linux containers running on a linux host in data center. I was asked to explore feasibility of moving these containers to Azure as part of cloud migration strategy, but I am ...
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1answer
1k 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
11 views

Running a different configuration.nix file into a virtual machine from a non-nixos operating system

In the amazing nixos, it is possible to launch a lightweight container that will run a system whose configuration.nix file is different from the host configuration by using: nixos-rebuild build-vm -I ...
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1answer
94 views

Qubes-OS transfer files from and to HVM

I can't find in the documentation how to transfer data from and to the HVM in Qubes-OS. When a normal AppVM is created, it has the Qubes Tools installed so easy copy and paste, and transferring files ...
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1answer
29 views

What is better to install to virtualization on ubuntu? [closed]

i have home server and i want virtualize all my hosts (web,radio, tracker, file server etc) to use more then one OS. So for host OS i want install Ubuntu-server on HDD 500gbx2 Raid 1. i want to ...
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6answers
20k views

VMware kernel module: a compatible version of gcc was not found

When running the VMware kernel module updater, I get the following message: A compatible version of gcc was not found. How can I setup GCC to compile the VMware kernel module?
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2answers
1k 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

Shared folder does not appear in guest CentOS (Windows host), using VMWare

I've been trying to share a folder between my guest, Cent OS, and host, Windows 10, using VMWare Workstation 14 Player. The easiest way, drag&dropping files from host to guest, does not work ...
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1answer
104 views

How to install Guest Additions with a Oracle Gnu/Linux guest on VirtualBox?

I have a Linux virtual box and want to install Guest Additions. I've successfully mounted the iso. But now what...? How can I access the mounted cd-rom in the terminal of the virtual machine as to ...
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2answers
37 views

delayed bash script execution after boot

My Fedora Linux (presently 30) system hosts several virtual machines (VMs) configured to start up when host system boots. These are isolated servers supposed to be visible from the internet containing ...
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0answers
21 views

Configure XFCE in Debian etch (4.0)

i am currently installing Debian Etch as a Virtual Machine with Virtual Box (the host is a windows 10). I used an iso (from debian website) to install it, but it seems that no desktop environment was ...
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1answer
19 views

Creating virtual Audio device

There is a Linux (Manjaro) PC without an audiocard. Is it possible to create a virtual audio device? The usage idea is the following: virtual audio device process a sound, then there is a server ...
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1answer
13 views

Top command output for Virtual or Physical Machine

Does top output display information particular to the VM I am in, or the entire physical machine? top - 17:22:04 up 22:37, 1 user, load average: 72.55, 73.18, 66.84 Tasks: 140 total, 1 running, ...
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1answer
2k views

How do I assign static IPs for HOST, BRIDGE, and GUEST

I am learning networking by building a small virtual network within a CentOS host. I need some guidance at the highest level to start planning: The Scenario: A CentOS 7 HOST needs to have a ...
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1answer
16 views

RHEL KVM stuck when trying to create VM under VMware Fusion

I am trying to use KVM on RHEL 7 VM but after I try to create a new VM it goes well until I click Finish button, at that moment the window stuck and does not respond anymore, so I can't create a VM! ...
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1answer
1k views

Arch linux ( kvm/qemu virtualization ) failed to open libiscsi.so.4

I have fallowed the steps from Arch Linux #KVM and #qemu 1) sudo pacman -S then installed libs libvirt libiscsi libaio qemu qemu-arch-extra qemu-block-iscsi qemu-block-rbd qemu-block-gluster ...
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1answer
1k views

How to access KVM windows guest bios

How to access KVM windows guest bios: As I want to check guest bios virtuliazation options to enable nested virtuliazation, like vm inside vm.
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1answer
17 views

How can I get the windows installation in a virtualbox in ubuntu host to have full resolution as the original monitor?

I've installed virtualbox with the following command $ apt install virtualbox Then I installed Windows 7 in the virtualbox. But I notice that even though there are very high resolution options in ...
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2answers
3k views

Why are my cloned linux VMs fighting for the same IP

I've cloned two vSphere VMs off of an Ubuntu 17.10 template. After boot, they both claim the same IP and fight for it (ssh connections break off as the IP switches between them). The hostnames and ...
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1answer
3k views

CPU mode 'custom' for x86_64 kvm domain on x86_64 host is not supported by hypervisor

I have the same issue as here, but the solution does not work to me. Every time I want to create or run a VM with virt-manager, I get the same message: Error al iniciar dominio: configuración no ...
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0answers
30 views

Failed to create pipeline: no element “autoaudiosink”

I have windows 10 vm running on kvm on an Arch Linux installation. When I run view it with virt-viewer and I try to watch youtube in a browser, it shuts virt-viewer down with the error: GSpice-...
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0answers
27 views

How to start X server in Debian Wheezy mips running on qemu?

I created a debian mips virtual machine by downloading qcow2 images from here. I then started the virtual machine by qemu-system-mips \ -m 256 \ -M malta \ -kernel vmlinux-3.2.0-4-4kc-malta \ -hda ...
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2answers
33 views

Can't install windows guest on virt-manager

I can't seem get a windows guest installed on virt-manager. When I start the machine before the install cd loads I get a blue screen with code SYSTEM THREAD EXCEPTION NOT HANDLED. Here's the logfile ...
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1answer
2k views

Problem running 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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0answers
13 views

CentOS 7 KVM host with two bridges

I currently have a CentOS 7 host with a single NIC and would like to be able to use this NIC for two different types of bridges. The host (CentOS) machine currently is currently pulling DHCP from my ...
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2answers
43 views

virsh preboot script

I am running a virtual machine that requires vfio access to a PCI card. Using this script I am able to successfully bind the PCI device and its iommu group to vfio-pci, which then lets me boot up the ...
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0answers
16 views

Bluetooth Speaker not recognized via USB

I want to update the firmware of my Anker Soundcore 2 Bluetooth speaker. The required software can be downloaded from: https://www.anker.com/update-firmware As the software is not available for Linux,...
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0answers
25 views

yocto Xen-Guest-Image-Minimal filesystem setup question

I have used poky/yocto project to create a xen-guest-image-minimal for Xen 4.9.0 (Ubuntu Server 18.04) running on a Xeon i586 processor. I am now preparing to create config file for the guest... and ...
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2answers
106 views

Virtual Machine Linux OS

I have a few Linux virtual machines running on this computer, and if I look at cat /proc/cpuinfo It is able to tell me the model name for the host system. Will this affect the performance of the "...
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1answer
3k views

Enabling Hugepages at boot time on centos 7

I am trying to enable hugepages for use with ovs and DPDK on centos 7. I have tried to edit the GRUB_CMDLINE_LINUX in /etc/default/grub see code below. GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=...
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1answer
2k views

Any better alternative to chroot on an OpenVZ VPS?

Are there any better alternative to chroot environment? I'm thinking about running nginx on a jailed environment. BTW, I'm on OpenVZ VPS, so modifying the Kernel is a no-no. (I think that prevents ...
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0answers
24 views

Possible limiting factor during upgrade of Fedora VM - not disk or cpu or network? [duplicate]

I'm upgrading a VM from Fedora 29 to Fedora 30. I triggered the update from inside GNOME Software. It downloaded the upgrade, and asked to reboot. It started installing... atop shows the qemu ...
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3answers
651 views

Run VM GUI on headless machine with kvm

Priorities: Security has high priority in all aspects. Scalability, ease of use and price are close seconds and performance also have a say. What I am trying to do: I am trying to run a minimal (...
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13answers
96k views

Easy way to determine virtualization technology

I have command line access to a Linux machine which may or may not be virtualized. I want to determine what kind of virtualization technology it runs on, if any (VMWare, VirtualBox, KVM, OpenVZ, Xen, )...
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1answer
3k views

High CPU usage when KVM Windows guest plays audio

I'm running a Windows 10 virtual machine as my daily driver, it's running on top of ubuntu server 16.04. GPU and USB expansion card passthrough works just fine but I'm experiencing maxed out host CPU (...
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1answer
49 views

Trying to SSH to remote server from VM Ubuntu

I need to ssh into a remote server. I set up a fresh Ubuntu install in VirtualBox for that purpose. First of all I generated my public key: ssh-keygen -b -4096 Then tried to ssh: ssh remote_user@...