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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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Virtual Machine Linux OS

Ok this may seem like a stupid question to many,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 ...
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1answer
26 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@...
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qemu-system-x86 --enable-kvm Windows 2k12 R2 stuck at windows logo

I am having an issue with kvm-qemu. Host: Ubuntu Guest OS is win2k12 R2. When the VM is booted, some times it get stuck at windows log or it pass the windows log & get stuck at a black screen. I ...
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2answers
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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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What virtualization platform does provide dynamic memory allocation?

I need a virtualization platform for Linux host that supports Dynamic Memory Allocation. By Dynamic Memory Allocation I don't mean Memory Ballooning where we can request memory from a running VM (...
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NS_error_failure 0x80004005 Virtual Machine Linux Mint [closed]

I'm trying to unlock the bootloader of my smartphone, then I'm using Virtual Box in order to be able to use a specific program on Windows 10. The problem is when I try to connect my phone in fastboot. ...
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0answers
79 views

How to route traffic through VPN only accessible within VM (without a bridged adapter)?

I have an interesting situation where I have a corporate VPN that can only connect through a specific (outdated) version of Ubuntu (and/or Windows) using a vendor-supplied client that creates a VPN ...
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9 views

Booting Android-x86 thru KVM while on a Pendrive-installed Debian 9

short version: Tried running KVM on a pendrive-installed Debian 9. All attempts result in the virtual machine running slowly if at all. long version: I'm currently running a pendrive-installed ...
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“Disk I/O error” when trying to run OS via QEMU on Pi

I am trying to run Windows 98 on QEMU on my Pi using a project I found here: https://www.hackster.io/314reactor/windows-98-wrist-watch-15ecfd . When I run qemu-system-i386 -localtime -cpu 486 -m 96 -...
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1answer
63 views

Is there something which a container can't be used for while a Linux virtual machine can?

When would you choose to use a Linux virtual machine instead of a docker container? Is there something which a docker container can't be used for while a Linux virtual machine can? Is it correct ...
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1answer
60 views

Is chroot an example of application virtualization in Linux?

I am not very certain about the concept of Application/Process Virtualization. To help with that, what are some examples of application virtualization in Linux? (https://en.wikipedia.org/wiki/...
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4answers
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Lightweight desktop environments to replace GNOME for CentOS?

For a project I need to write and execute Ansible scripts in a Linux environment (CentOS). Though using the command line and vi is interesting, I need to use graphical file explorer and Visual ...
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1answer
20 views

Virt-viewer fullscreen with 2 monitors in dwm or i3

Is there a way to start virt-viewer -f domain in DWM or i3 so it automatically fills all (2 of) my monitors as it does in gnome? When I try now virt-viewer open both screens on 1 monitor on top of ...
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1answer
178 views

VirtualBox Error : Kernel Driver not installed(rc=-1908)

I am currently using Ubuntu 18.04 and VirtualBox GUI Version 5.2.18 and I faced the following bug: Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either ...
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1answer
62 views

Virtualbox: install a x64 Windows OS from Ubuntu?

I was thinking about making a Virtual Machine, but the description of VirtualBox from the Software installer say: VirtualBox is a free x86 virtualization solution allowing a wide range of x86 ...
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1answer
39 views

Can the virtual machines created by Docker be used in a standalone way without Docker?

Docker can creat virtual machines to be used as nodes in swarms. Can the virtual machines created by Docker be used in a standalone way without Docker, or are they only usable by Docker? For ...
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1answer
62 views

Does Docker work with VirtualBox but not with KVM/QEMU?

Docker can creat virtual machines to be used as nodes in swarms. The machine drivers contains VirualBox but no KVM/QEMU. Does it mean that virtual machines created by KVM/QEMU can't be used as ...
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How can I reconfigure my VM to have console on serial not graphical card?

I created a Debian virtual machine with LVM encryption in virt-manager. When I start the VM from virt-manager, I am asked to provide password for the LVM encryption. But now when I start the VM and ...
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How can I use multiple mounted folders in KVM?

I have a KVM-guest, where 5 folders should be also accessible on the host machine under a single folder. How can I do that with a single mount point? The folders on the vm are: /var/log/apache2 /var/...
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0answers
39 views

Compress VirtualBox Linux Virtual Machine

I am trying to create a VirtualBox linux virtual machine on which I want to mainly run Wine to install a windows application. I managed to install Lubuntu 18.04.2, since it is the lightest Ubuntu ...
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1answer
74 views

ssh asking for a password but not accepting it

I'm trying to scp through a virtual machine but when the guest terminal asks for my host user password it simply does not accept my real user password. Is the machine asking for another entry? The ...
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2answers
32 views

Change CPU count on live Linux VM

Is it possible to change the number of VCPUs on a KVM virtual machine on Linux without stopping it first? The Linux kernel has calls for addition and removal of CPUs (CPU hotplug in the Kernel) for ...
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1answer
47 views

Cursor jumps to left corner (windows 10 vm - kvm)

So I have a Windows 10 VM running on Arch Linux and it is working fine with 1 Display. When I add the second video tag with virsh edit VM-name, and get the two displays, the mouse starts moving around ...
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1answer
37 views

How do I shut down detected virtual machines on Mac OS?

I haven't used VirtualBox probably since 2016 and today I dusted it off and of course I needed to install an updated version, but I soon got this message: The installer has detected running virtual ...
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20 views

1 NFC Device found but won't list it

I am running a VM of Kali Linux. I have an ACR122U NFC Card Reader. One problem I have been having is that when I attach the NFC reader to my PC and run nfc-scan-device -v, it returns "1 NFC device ...
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21 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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69 views

Xrandr increase resolution black screen

When I try to increase the resolution in my virtual machine (Xen), running a debian distribution (Kali/Parrot in this case), I get a black screen. I use xrandr, because in the GUI, the max resolution ...
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0answers
68 views

Qubes-OS install Qubes support tools in HVM to fix screen resolution and copy paste

I want to install a fully virtualized machine (HVM) with Kali Linux in Qubes-OS. The installation itself was a bit bumpy but I managed to install it correctly. Now, the issue is that I want to ...
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0answers
20 views

Unable to uncapture the mouse pointer in QEMU KVM on CentOS 7

I am unable to see the mouse pointer on the console while on KVM Virtualization. I have tried the Ctrl-L+Alt-L but that does not work.
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1answer
58 views

How does Docker run GUIs?

I wrote some Java desktop applications and thought I'd run them with Docker to learn about containers. I got the Java applications into a Docker container with an ubuntu image. And that's when I ...
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0answers
8 views

Diskimage (qcow2) size on NFS in the context of virtualization

We are running a KVM virtualization platform with NFS as storage backend. The disk images are qcow2 files (This is "as-is" and we cannot change the setup). Now we need to move a rather large VM with ...
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1answer
29 views

During automated RHHI installation, what do they mean with 'Virtual Machine Mac address'

When I want to run the ansible scripts for automatically installing RHHI on my physical (RHEL+KVM based) hosts. They ask to edit a json file in which I am required to give the FQDN and MAC address of ...
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1answer
29 views

Fedora 29 qemu time problem

Since i upgraded my workstation from fedora28 to fedora29 i encountered a problem with my virtual machine which is running on my workstation. I am using this virtual machine for browsing in the ...
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1answer
45 views

CPU usage increases on all guests if 1 guest has high usage (QEMU-KVM) [closed]

The point is that if I utilize the CPU on 1 guest, all the other guests see increase in CPU usage. I'm testing with stress-ng, but it's visible with normal workload as well. I really don't know if ...
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0answers
48 views

After installing Clear Linux on VMware Player 15, it launches the installer again

I'm trying to download clear linux on my VMware player 15. I got windows 10. But each time I press "install", it installs the files of the OS, and then I press "Reboot" when it's finished, but it ...
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1answer
166 views

Why is a machine of type i440fx created when I specify q35 and how do I get q35 to work?

I need to create a Windows VM with a Q35 machine type. However, in spite of specifying q35, and i440fx machine is created. created with: sudo virt-install \ --name wintest \ --boot uefi \ --ram ...
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1answer
22 views

C-state in VM: needed or no?

Would it cause any difference if the cstate is enabled or not on a VM? cat /sys/module/*_idle/parameters/max_cstate So not on the hypervisor, rather on a VM. Any virtualization, question in ...
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0answers
24 views

VMware Workstation guests NAT adapters always got the same IP address

I'm on Windows and created three Ubuntu 18.04 Desktop virtual machines using VMware Workstation. This is my NAT and custom host-only network configuration. This is my guest VM's network adapters. As ...
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1answer
46 views

Can I run a .vdi file for Windows 8.1. virtual machine in KVM/QEMU or VMM?

Can I run a .vdi file for Windows 8.1. virtual machine in KVM/QEMU or VMM? Do I need to convert the file from .vdi to some format familiar to KVM/QEMU? What are the steps, if possible? I have ...
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1answer
21 views

What are the processes started for running a virtual machine under Virtual Machine Manager?

I am trying to figure out what processes are run when I start a KVM virtual machine under Virtual Machine Manager. Are these all the processes started for that purpose? What do they do respectively? $...
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1answer
128 views

What is the relation between Virtual Machine Manager and KVM/QEMU?

What is the relation between Virtual Machine Manager and KVM/QEMU? The Wikipedia links says In computing, the Red Hat Virtual Machine Manager, also known as virt-manager, is a desktop virtual ...
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1answer
111 views

virsh: Connected to domain <name> Escape character is ^]

I'm having an issue with viewing output from a virtual machine installed via virt-install. I first used this method, but it left me with the following immediately after running: Starting install... ...
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0answers
29 views

Increasing the size of RHEL virtual hard drive in Virtualbox? [duplicate]

My host OS is Ubuntu and on top of that I'm running Oracle Virtualbox with RHEL7.5 Workstation. The original amount of space that I allocated was 47GB. I increased that to 80GB by doing: However, ...
2
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1answer
91 views

Linux Mint on Virtual Box Display Bug

I've run into a small problem when I launch Linux Mint on Virtual Box. During bootup everything seems to be fine. Linux mint logo appears and counts down from 9 until automatic boot, during boot 2nd ...
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0answers
32 views

Black screen while emulating buildroot built kernel on QEMU

Till this date I was only able to emulate the RPI kernel but I want to emulate BeagleBone Black & i.MX based firmwares that I've built using buildroot. I'm passing the following command:-- qemu-...
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2answers
213 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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3answers
51 views

disk partitions don't mount to filesystems after reboot

i have a VM machine that rebooted last night and we could't connect to it via ssh. i used console and saw that only / and swap are mounted with lsblk command: NAME MAJ:MIN RM SIZE RO TYPE ...
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1answer
73 views

Render Linux VM applications on Windows Host Xserver

I have a Ubuntu VM on VirtualBox running in headless mode. Host is a Windows 10 machine. I want to be able to render Ubuntu's applications on Windows using XServer. Currently, I tried this: ...
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0answers
46 views

How to solve gptboot: No /boot/loader on 0:ad(0p2) issue while installing Freebsd?

I have installed FreeBSD 12.0 in vmware virtual machine. After installaion, I am getting below error while booting. gptboot: No /boot/loader on 0:ad(0p2) gptboot: No /boot/kernel/kernel on 0:ad(0p2) ...
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0answers
78 views

How do I run a raw file in qemu? [closed]

I have been trying to run this project from github. https://github.com/asafch/xv6-paging My machine is running ubuntu 18.04, so this code isn't running here. I have seen this solution Booting a raw ...