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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Forward data from unix socket to cups printer

I'd like to print out of a VM (KVM/QEMU via virt-manager). For the VM to host connection there is an emulated parallel port in the VM that should be connected to a Unix Socket. I tried to create a ...
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How to make work the i686 version of ubuntu 18.04 (emulated with exagear) on the jetson nano

Someone of you still use and or remember the "old" exagear tool ? it has discontinued on 2019. I’ve installed it on my jetson nano and I have also activated an old license that I’d bought ...
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How to make Virtualbox qt UI stop asking about USB Passthough every time I start it?

Every time I start it asks me in a dial log to "enable" or "disable" for USB Passthrough. The message also says that it will reappear after updates. The issue is I am on SUSE ...
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Very long kernel build time

I have a small problem related to kernel build time. Sorry for a bit messy writing. I'm very poor at it. :D We (my team) are using qemu for rebuilding Linux kernel for our product. We all share ...
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Lost Users & Groups

What is happened, if the groups and users were lost in a folder like this ... Result of ls-lsa 4 drwxr-xr-x 6 64055 64055 4096 Jan 12 20:57 . 4 drwxr-xr-x 3 64055 64055 4096 Jan 11 13:25 .. 4 -rw-r--...
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Create a System Image from Existing VM

I have scope to migrate an existing VM server to new Cloud Provider. since its already has running live application, we are looking option directly create image out of existing system and use it new ...
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301 views

Intellij IDEA: Unrecognized VM option 'UseConcMarkSweepGC'

I installed Intellij IDEA from on my arch using yay. I worked fine but recently it started doing this: john@arch-thinkpad ~ [1]> intellij-idea-ultimate-edition Unrecognized VM option '...
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Oracle VirtualBox for Ubuntu detecting avx & avx2 for one CPU but not the other

I have been looking into this issue for days now. In short, Oracle VirtualBox started supporting avx & avx2 since version 5.0.3. Right now, it's on 6.1.16, so way ahead. I had many problems ...
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fence_virtualbox failed to reboot

I’m learning how to fence pacemaker using fence_virtualbox from [ClusterLabs] Fence agent for VirtualBox, but I can’t get it working. When I try to run stonith_admin –-reboot <node id> it failed....
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Can I use a Terminal as the Graphical Console for a VM in with Virt-Manager/Qemu?

I am doing a System V install in Virt-Manager (nothing spectacular) it works great on its own, and I have no retro hardware. The installer is a i386 floppy image, but sadly I don't have a 500 MB HDD, ...
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setxkbmap -option ctrl:nocaps does not map Caps Lock to Escape inside Debian VM running in Oracle VirtualBox on macOS

I am using Xfce 4.12 on Debian 10 running inside Oracle VirtualBox 6.1 running on macOS Catalina. All my key mappings are set to default on macOS. (System Preferences > Keyboard > Modifier Keys &...
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With qemu-kvm VM, how to determine the number of `pcie-root-port` devices?

I use qemu-kvm on a DELL server multi-core system with 64 cores 512GiB system to create virtual machines. Using libvirt the qemu-system-x86_64 command line features lots of pcie-root-port devices ...
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How can I use unique hostnames across VMs with a shared root filesystem? Is this method even recommended?

Background I am creating several VirtualBox instances to use as Web development environments (Arch host/Debian guests), and I want them to share most files but have an additional drive for each ...
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Linux Subsystem for Windows [closed]

There is Windows subsytem for Linux and... Is there Linux subsystem for Windows? That allows you to access Windows terminal on Linux like on Windows subsytem for Linux. The Windows Subsystem for Linux ...
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virt-manager VM cannot access outside network when VPN is enabled

I am running CentOS7 as a VM on Virtual Machine Manager (virt-manager 2.2.1) on Ubuntu 20.04.1. On the same Ubuntu machine I am running AnyConnect 4.9.03047 to connect via VPN. When the VPN is not ...
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How can I set the current value of vCPUs lower with Citrix XenServer 8.2?

I've setup my VM as so: Note: It's initial number of vCPU is 2 Later, I increase it but notice that there's no way to decrease it: Question: Is there any way to change the current number of vCPUs ...
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programmatic control of application's perception of time

I'm looking to be able to control an application's perception of time from another process. Meaning I want to be able to fast-forward the clock. Whether by accelerating it, or stepping, either would ...
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how do you check to see if your cinnamon desktop is running with 3D acceleration (i.e. not “software rendering”)?

I have a VM that is sluggish and I think I fixed the issue but I want to make sure the cinnamon desktop is running with 3D acceleration (i.e. not "software rendering"). How do you check to ...
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Use Apple's usdzconvert on a Linux machine

I've successfully built Pixar's USD pipeline on a Linux VM, and I now strive to accomplish something similar to Apple's usdzconvert from their USDZ tools. As of right now, I'm able to run the standard ...
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SSH into VirtualBox VM without Wi-Fi

I'm running an Ubuntu 20.04 VM via VirtualBox on MacOS. I've got two network interfaces set up. One of it them is a bridged connection and the other set for "internal network". I prefer ...
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Debian 10 Virtualbox guest not resizing screen after guest additions install

I'm using a Debian 10 guest in a Linux Mint host, and having trouble with the resizing of the screen (it doesn't resize at all). The bidirectional clipboard is working, so parts of the guest additions ...
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GenIsoImage Kernel loading below 1 MB

I'm coming to you since I don't really know where to put this. I followed instructions at "the little book about OS developement". If you're interested, here is the link: https://...
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Gedit doesn't work in Kali 2020

Kali 2020 doesn't come with gedit pre-installed. After installing with sudo apt-get install gedit and trying to run, I get an error message: ┌──(kali㉿kali)-[/root] └─$ gedit test.txt Unable to init ...
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Can I run a virtual machine or like a linux shell in a webapp/website or host it on a webserver?

I asked this question before and I am going to refine it so I can get a better answer. I am planning to make a java webapp and I want to add a feature to it which is what I need help with. I want to ...
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Why qemu doesn't install aarch64 alpine Image on x86_64 ubuntu host?

I download qemu-4.0.0.tar.xz from here and after installing all necessary dependencies I run $ ./configure --target-list=aarch64-softmmu to have QEMU installed. I double-check the installation with $ ...
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Is it possible to resume a LINUX hibernation putting the disk (with the swap file or partition) in another computer?

Can I put my work computer into hibernation (when the RAM is copied to disk and the computer is shutdown), wait it to switch off, take the hard drive, put it into another (similar, but not identical) ...
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How can I embed linux virtual machines in a website or a webapp?

I am planning to start a project to build a webapp, and I had an idea that I have seen in many places. I have seen some websites where they have a linux virtual machine and a bash terminal is embedded ...
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how to communicate from an external os to an virtualbox machine

i have two pc and in one of them i have an ubuntu and on another i have an ubuntu that installed virtualbox machine on it. i want the VM on the second pc be in an separate network and i can ...
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Guix System Problem with GNOME Boxes

To build a virtual machine with GNOME Boxes, I have this problem: "virtualization extensions are unavailable on your system. Check your bios settings to enable them." what's the solution?
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Intermittent connectivity to a SunOS 4.1.4 virtual machine

I am running SunOS 4.1.4 (those were the days...) under QEMU, networked via a tap device on the host. I'm starting the vm like this... qemu-system-sparc \ -rtc base=utc \ -drive file=sunos-...
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Routing application to a virtual microphone (pulseaudio)

I am trying to route my application's audio to a virtual microphone whilst still being able to hear the application on my end. Is there any way to achieve this, and if so, how?
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Config to minimize write amplification in QEMU VM?

Here's what I'm trying to accomplish, per-VM virtual disk image. (Win10 and Ubuntu VMs as "desktop" OSes, among other minor headless VMs): At-rest encryption (w/ thumbdrive key) Transparent ...
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How to enable local network access to a VM using QEMU/KVM and Virtual Machine Manager

I've been spending all day trying to solve this little puzzel. I've got a Ubuntu 20.04 lts. I've installed QEMU/KVM and Virtual Machine Manager on it. I'm trying to create a VM that have direct access ...
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How to add a new parameter to the arch linux kernel using efibootmgr

I'm running arch linux with esxi 7.0. What I'm trying to do is to modify the parameters of the kernel that I'm using adding a new parameter or I can also try to create a new entry. I'm not using grub,...
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Kali freezes after login in vbox

I recently downloaded a Kali Linux OVA or Open Virtualization Format File from the their official offensive security page. But after importing the OVA file and booting it, it looks like a normal boot ...
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UUID number of the physical arch linux / root partition is not recognized by esxi 7

I'm trying to boot with esxi 7 the physical installation of arch linux,that I created on the disk /dev/sdc in efi mode,where sdc1 is the efi partition and sdc2 the root partition. In arch linux the ...
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Virsh - Autostart VM Upon Network Bootup

I started my first VM using a script my apprentice made. After a few days my graphics card froze so I had to reboot the server. Upon restart, I can see virsh list --all shows the VM I set up but the ...
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Is there a USB Wireless device emulator for Linux?

I would like to have a Wireless device available in a Linux VirtualBox machine, but VirtualBox doesn't offer the option to expose the builtin PC Wireless device to the VM. It's possible to purchase a ...
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Linux redirecting a directory to some other directory only for a specific application

I have run a program that accesses some files from the directory /etc/somedir. What I want to do is whenever it tries to access /etc/somedir/somefile it automatically redirects to /home/arch/...
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Virtualization: Virtual Machines or Docker π

I want to clear up some ambiguity in my head. I am running a baremetal server with CentOS7 on a local business network behind NAT. Because the main software on CentOS7 requires PHP 5.4.16 and cannot ...
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how to merge resources of Multiple Servers?

i just need to know is this possible that we can merge or create the resource pool of multiple server , or how can we create a cluster of multiple server so that they act like a single Server with ...
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/usr/local/sbin/oxenstored: error while loading shared libraries: libxenctrl.so.4.14: cannot open shared object file: No such file or directory

I've just compiled xen 4.14 from source on ubuntu 20.10. The compilation didn't produce errors. But then,when I ran this command : root@zio-z390aoruspro:/etc/xen# sudo /etc/init.d/xencommons start ...
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When making a VM, why would I want to not pass it all my cpu cores?

(I'm using xcp-ng/xen as my hypervisor but general question as I also wonder this about qemu/kvm and virtualbox when I use them) whenever I make a VM, I have an option to give it as many cores as I ...
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Kali VM unresponsive and frozen when shutting off

There's some important details here but here's the gist. I have a Kali Linux VM running under VMware Workstation Player 15, and when I try to turn it off it freezes and will not turn off without ...
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ZIP file not opening (corrupted)

I have been tasked with fixing a corrupted zipfile - the clue I have been given is to change its file header. I looked at the hex bytes using gHex and changed 50 4B 05 06 to 50 4B 03 04 but it's still ...
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Can not install OS on QEMU VM with GPU passthrough

I followed the guide to create a VM with GPU passthrough here: https://mathiashueber.com/pci-passthrough-ubuntu-2004-virtual-machine/ After creating the machine I saw the UEFI Logo on my screen and ...
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VMware Player - Is it possible to set ram to be used by the guest only?

I am using the VMware player 16 on linux. I am pretty impressed with the graphics performance, but I have a major issue. I have used the gui to make 8GBs of ram available to the guest. But I still ...
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How would I manually set an interfaces type in networkmanager?

At the moment I have been playing around with some VMs and networking recently (just for the learning experiance), at the moment I have an interface on the host called "veth0" connected to ...
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How to run emulate Screen/Display and pass it to container?

I want to debug windows manager (kwin_wayland). I don't have second machine handy to use it for remote debugging. So virtualization is my best option. I dont want to use KVM. instead I want to use LXC/...
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SSH with password from Windows Command Prompt and Execute Command

I am stuck with some shell scripting on ssh-ing into a linux/ubuntu machine and then executing a script (bash/sh). I need to do this in order to perform benchmarks. So far I can open up the command ...

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