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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Run QEMU with graphical output from Tty

I found out that you can run MacOS from Linux with QEMU and that worked already with my main Linux install but I want a second install that only has Tty "running" in the background (so I can ...
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1answer
158 views

How to active the second console to a FreeBSD guest running in bhyve?

Background I'm running FreeBSD 12.1-RELEASE as a host for bhyve virtual machines. I have a FreeBSD 12.1-RELEASE guest running inside a VM. I would like to have two TTY-class devices configured for it. ...
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RHEL VM network bridge not wokring after desktop is ready

I have this weird problem in my RHEL 8 VM running in oracle Virtualbox. Below is the network settings I defined. Till last night it was perfectly working fine. But after configuring this node as ...
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98 views

How can I create a virtual test environment for multicast programs?

I am trying to create virtual network devices in order to test and develop multicast programs. My computer has a single NIC with one Ethernet port, which is connected to the Internet. I want a second (...
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808 views

How to create snapshot with UEFI firmware on virt-manager?

I am using qemu v2.11.1 and libvirt 4.0.0 - both are latest stable for Ubuntu 18.04. The guest is Windows 10 running on Tianocore UEFI firmware. When I tried to take a snapshot on virt-manager, it ...
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85 views

Using “acpi=off” in a virtual machine

Does using the kernel command-line option acpi=off in a virtual machine (i.e VirtualBox 5.2) make sense when the host OS has been booted with ACPI on ? I mean for debuging purposes if someone wants to ...
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25 views

VirtualBox can't boot my ubuntu 18.04

This is what my screen shows, I tried multiple times, but every time, it just stagnated here. It worked last night, and I don't know what happens.
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Run windows driver for usb writing pad without vt-x

I want to use an old usb writing pad, which is a hiddev. My laptop's cpu (intel core 2 duo T5250) doesn't have vt-x. Can virt-manager or wine run the software/driver for windows? Can I use 32 bit ...
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42 views

Having trouble setting up a Share Folder between a Linux and Windows Systems (I/O Error while Writing through Linux)

I'm currently running a Fedora VM through VMWare, on a Windows 10 Host. The past few days I've been trying to set up a share folder between the two systems. And though I managed to mount the Shared ...
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4answers
83 views

How to Install Linux distribution and run windows from it?

So I've recently decided on switching to Linux and running windows from within it (for day-to-day programs and games) and have Linux as a main OS for delicate stuff like bank details, etc... Issue is ...
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how to virtualize an oracle linux 8 for arm

I want to try Oracle Linux 8 for arm on a virtual machine before running it on my raspberry pi 4 B. from my research I found it's not possible to do it on a windows 10 for some reason even using ...
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330 views

Windows 10 VM ignores QXL video memory changes

[Linux Mint 19.3 host, UCA Stein PPA for QEMU v3, Windows 10 v2004 guest] I'm trying to allocate more video RAM to my Windows 10 VM. I've always done this via virsh, changing these line: <video> ...
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Debian on Synology NAS keeps changing timezone

I have a Debian setup running on Synology NAS Virtual Machine Manager and it keeps changing the timezone. At the top of the screenshot above you can see that the timezone was GMT -4. then, at the ...
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2answers
535 views

Setting up Windows 10 virtual machine in Fedora

I recently made a total shift to Linux(Fedora 32). Ran dual boot with Win 10 for a month and then removed Windows from dual boot. However, MS Office is being taught in my sister's school. So, I need ...
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Clear unused space in KVM Virtual Machine

I have a sparse Virtual Machine. When I boot VM and df I get this /dev/sda1 98G 3.4G 90G 4% / When I check size of qcow2 image ls -sh 6.2G Image.qcow2 Image size should be 3.4G like used ...
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Why does `virsh console x` hang on “Escape character is ^]”? (qemu-kvm)

The company where i start working for 2 months ago have an old hypervisor running with a few virtual machines. I logged in into one of the machines (at that point i did not know it was a virtual one) ...
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51 views

Gaming mouse not detected in windows 7 virtual machine

I have a gaming mouse from an unknown brand, but I have access to a program that came with it for customizing mouse buttons, lights etc. The software for this only works in Windows, it says it is for ...
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Ubuntu not running Xterm: display not set (Not SSH, trying VM)

I was tasked with running a lab with netkit, http://wiki.netkit.org/man/man7/netkit.7.html for those interested. It creates a virtual machine meant to simulate a network connection. I have the install ...
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How do I install Debian Wheezy 64 on a VM that I have opened on a Windows machine? I am facing issues with the mirror

I am a full linux newb and my programming experience is mostly in Python. I need to run software (specified here https://github.com/ins-amu/scripts/wiki) to analyze data. I have a windows machine ...
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1answer
540 views

How to create partitions on qcow2 image without reserving disk size

I want to install archlinux in UEFI mode so, I created image from virt-manager with size of 20GB. Then after booting into VM, I created 2 partition with fdisk named /dev/vda1 and /dev/vda2 with 512MB ...
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5answers
1k views

How do I create 100 virtual servers for testing?

I want to create 100 virtual servers. They will be used for testing, so they should be easy to create and destroy. They must be accessible through SSH from another physical machine (I provide the ...
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0answers
8 views

How to start a virtual machine with Virtual Machine Manager with a command?

I'd like to configure a shortcut that starts a specific virtual machine with Virtual Machine Manager (virt-manager). Is it possible to start a virtual machine (preferably in fullscreen) with VMM with ...
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100 views

Dell XPS 9300: Virtualization option in BIOS and Wifi

I have a Dell XPS 13 9300 with Debian 10. I was experiencing the same issue as the user Marc on this thread: the laptop would hang with a blank screen before completing shutdown/reboot, forcing me to ...
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1answer
37 views

How can I get my hands on a free virtual machine and how does VirtualBox work?

I would like a virtual machine and lots of places online are saying that the website VirtualBox supplies free virtual machines, I go to their website and just see a download button? - I want to have a ...
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91 views

How to enable multithreaded TCG in QEMU?

I need to run a 64bit system on a processor that doesn't support any virtualization technologies. QEMU can do that easy, no problem, using the TCG accelerator. But only in single thread. No matter how ...
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18 views

new qcow2 from snapshot

I actually have originalImage.qcow2 (~46GB) comporting Snapshot1 Snapshot2 Snapshot3 and the actual VM And now I want snapshotImage.qcow2 (~6GB) comporting Snapshot1 Snapshot2 Snapshot3 And I want ...
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20 views

Is it possible to use a VM as driver?

I want to use a wireless usb adapter for my raspberry pi 4 but there are only drivers available for windows. Since ndiswrapper does not work on a raspberry pi my second idea was to create a VM running ...
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73 views

Guest OS freezes with latest VirtualBox 6.1.8-137981

Ubuntu has very old VirtualBox in their repository wolf@linux:~$ apt policy virtualbox virtualbox: Installed: (none) Candidate: 5.2.34-dfsg-0~ubuntu18.04.1 Version table: 5.2.34-dfsg-0~...
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1answer
60 views

How do rename virsh disk-only snapshots?

I created a few snapshots with virsh snapshot-create-as --name "yyyymmdd-snap.qcow2 --disk-only --domain my-vm.qcow2 and made a bit of a mess with the snapshot image filenames. It appears that ...
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549 views

My Windows 10 guest OS emulated with qemu / kvm is not able to boot itself anymore?

Houston,I have a problem trying to boot again Windows 10 guest emulated with qemu and kvm on Linux ubuntu. This problem arised when I have installed Windows server 2019 on the 2 ssd disk (named disk1 ...
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3answers
907 views

Convert libvirt xml into qemu command line

I created a VM using virt-manager and I can edit that xml using virsh edit, but I would like to ask you if there is way of converting libvirt xml into qemu command line. I've found that someone else ...
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2answers
365 views

how to transfer files from Kali?

I am using Kali Linux on virtual machine and i want to transfer a file from it to my phone. maybe blue-tooth or USB anything but i don't know how to do that or maybe i have to move it to my host ...
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14 views

Full screen ubuntu 7.04 VM

I try to use Ubuntu 7.04 on my Mac using Virtual Box. The only problem is that I cannot run in fullscreen mode. I have already tried to Insert Guest Additions CD Image, but I get this error: Unable ...
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761 views

KVM-Qemu Windows 10 guest VM can't connect to Samba Share

When paste my linux host IP where i have Samba server, into the windows URL bar and hit enter, the connections that i created in Samba appear but then i am not able to connect, it appears this message ...
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1answer
33 views

Cannot log into VM After Reboot

Our VMs run on VMWare. I am not certain the version, but I want to say it is ESX 6 (or vSphere 6). The guests I support and administer are all CentOS 7 Today, I wen through and extended both a ...
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1answer
132 views

ssh in to multiple VMs simultaneously

I have to ssh into two VMs. The first VM is configured to be sshed into via port 22 by default. But what changes do I make and where to ssh into second VM from host terminal. even when I close the ...
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1answer
279 views

How to disable a connection using nmcli over ssh on a virtualbox machine?

I can disable a connection using the command below on a virtual machine (CentOS 8): nmcli con down connection_name But, when I'm using SSH to manage the VM OS, the command above, does not do ...
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1answer
2k views

How to configure a bridged network for a QEMU/KVM virtual machine so that it's on the same local network connected to via WiFi?

I'd like to configure my QEMU/KVM virtual machine which I set up using aqemu to be on the same local network as the host computer which runs Debian/KDE. Do I have to configure a bridge on the host ...
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0answers
14 views

Disabled Interface Types for Virtual Network Interface Settings

I have a question about virtual network connections types when using the web interface console on port 9090 (https://:9090). This is on a CentOS 8 machine. Why are certain items disabled in the ...
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13 views

Is there a command line expression that will return which virtual desktop a given terminal is open on in SUSElinux using VMware?

I work with lots of terminals open on many virtual desktops; each desktop given a meaningful name to make it very easy to multitask. My problem is that I lose the virtual machine I am running on ...
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95 views

How to prevent sound getting distorted when adding an USB passthrough for my controller to a KVM/QEMU virtual machine?

I created a virtual machine with aqemu and the sound was working properly in the vm. Then under Media -> Computer Ports -> Add USB Port I added a passthrough for my mixer connected via USB. After ...
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1answer
55 views

Relationship between AWS EC2 VPC and Xen Networking

Does characteristics of networking configuration on AWS VPC (public IP, private IP, subnets, route and gateway) are derived of Xen networking model?
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53 views

How to connect a qemu / kvm mac os x guest os to internet inside WSL2

I've installed ubuntu 20.04 on WSL2 and I started a VM with qemu and kvm,running mac os x as guest os. It works great,except for the configuration of the net. Infact it is not able to connect to ...
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101 views

Failed to initialize kvm permission denied

Just installed KVM to setup some VM's (using this command: sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils libguestfs-tools genisoimage virtinst libosinfo-bin virt-manager ...
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22 views

Guest machine using all the RAM allocated to it

I have installed KVM on my host machine (Linux). and I created a guest machine (Windows) on it. I have assigned 16GB RAM to the guest machine. so on the host machine, it shows 16GB RAM utilized. even ...
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8 views

Can I use Virtualbox to accurately compare two custom distros regarding resources usage and performance?

I'm custom building a ubuntu-based distro for my engineering company. In fact, I'm just selecting the applications and writing a few bash scripts to serve our purposes and automate repetitive tasks, ...
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1answer
211 views

What format does Cockpit need for local VM images?

I am using Cockpit to stand up VMs on my Fedora 32 server (https://fedoramagazine.org/create-virtual-machines-with-cockpit-in-fedora/). I am able to stand up a VM without any issue if I use the option ...
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44 views

Can I dd iso to partition?

I have an iso with mac High Sierra on it. I don't want it to remove Linux, but I have no experience with booting from a live usb with anything other than Linux, so I don't know if I can safely boot ...
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1answer
56 views

Why vsock is using 32 bit port number instead of 16 bit?

While reading vsock specification I came across below quote A socket address is defined as a combination of a 32-bit Context Identifier (CID) and a 32-bit port number. source: http://man7.org/...
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1answer
594 views

Want to install VirtualBox Guest Additions on CentOS 7 but get a header mismatch

I try to install VirtualBox Guest Additions on a CentOS 7 VM. I installed the prerequisites via sudo yum install perl gcc dkms kernel-devel kernel-headers make bzip2 then I "inserted" the Guest ...

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