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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Flip-flop in shell

In Wikipedia there are two relevant articles about the term "Flip-flop": Flip-flop (electronics) Flip-flop (programming) I think that there is a formal-logic common denominator between the ...
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Can't type key “i” in terminal FreeBsd 12 on VM Box host

So I'm loading a VM Box machine(using oracle VM VirtualBox) of FreeBsd12.vdi OS, the problem is with the password, it is "admin" and when i type 'i' letter it's displayed as "?" in ...
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Installing OVS with DPDK

I am trying to install OVS 2.4 with DPDK, Here are the steps I have followed. Install DPDK as git clone http://dpdk.org/git/dpdk cd dpdk make config T=x86_64-default-linuxapp-gcc DESTDIR=dpdk-...
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Can I isolate/de-isolate CPU core dynamically in runtime without reboot?

Can I isolate and de-isolate CPU core dynamically in runtime without reboot(like isolcpus)? I want to change vCPU pinning of virtual machine, which is executing, using virsh vcpupin --live command, ...
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Virtualize RAID1 to proxmox virtual machine

I have standard physical machine which is Director for bacula. That means it just holds configurations and some data beside. Is there any best practice for virtualizing physical machine to created ...
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How to enable an Ethernet interface at boot on CentOS 8?

I have a VM which is connected to a network with DHCP etc. Whenever I boot the VM the virtual Ethernet connection is DOWN. I need to log in by console and run dhclient eth0 to enable it. Every time....
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Why does Alpine Linux write so much to disk during install?

I'm just getting my feet wet with Alpine Linux (v3.13.2) running as a VM. (On Hyper-V, but I don't think that should matter here.) I'm wondering why, after install, Alpine Linux appears to only use ...
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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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Setting up a virtual server group with a bridged interface

I posted a specific problem with DHCP over virtual network components here, but it is quite specific and does not cover the larger problem I would like to address. I have a physical server and want to ...
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Installing Parrot/Kali virtual machines on Ryzen processor (with Windows as my main OS) [closed]

I need to buy a laptop for creating a virtual machine and having Kali and/or Parrot OS on VM. My main OS will be Windows. This is for pentesting. So, are we good with buying a laptop with Ryzen ...
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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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Can't change netmask to other than /32 for a Debian virtual machine created on google cloud platform

I have created two virtual machines in google cloud platform both are on the same VPC 10.164.0.0/20. One machine is configure with static IP 10.164.0.2, and the other machine is configure with static ...
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After cloning a VM with virt-clone, how do I rename the newly created qcow2 file?

I wanted to build another server based on an existing config, so I performed the following: [user@box ~]# virt-clone --original serverA-rhel8 --name serverB-rhel8 --auto-clone Allocating 'serverA-...
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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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How do I use xhost for linking the display of one virtual terminal device to another?

I am currently trying to make an autonomous drone using the Robot Operating System (ROS). To do this, I have installed Raspbian Lite (Jessie) on a Rasperry Pi 3 and am currently using ROS Kinetic on ...
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Unable to SSH into VM from Windows 10 (was working before)

I'm running a Ubuntu 14 VM in Oracle Virtual Box on my host Windows 10 machine for a university assignment which runs mininet. Everything was working well until one day I woke up and tried to ssh into ...
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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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My Kali Linux screen goes black after I login after installing virtual box guest additions

I installed Kali Linux 2020.2 in virtual box 6.1.12. I was trying to open Kali Linux in full screen on virtual box so I gave following commands in chronological order with root access -- apt-get ...
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KVM and brigde nic in Manjaro is not getting IP from OpenWRT router and DHCP server

I have just followed the steps in the answer of the following: Does Virt-Manager GUI have a easy way to configure networking passthrough/bridge? and everything seems to work. But the virtual machine ...
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Cannot copy file from inside virtual machine/box to its HDD filesystem, sda

How to copy file from inside virtual machine/box to its host filesystem as it run bootable USB but cannot read /dev/sda? gnomebox didn't have any: Code: # lsblk -f NAME FSTYPE LABEL UUID ...
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Differences in networking between QEMU/KVM and VirtualBox

I noticed the following differences in the networking experience between QEMU/KVM (used through libvirt) and VirtualBox: For anything else than usermode or manual networking, QEMU/KVM needs a virbr0 ...
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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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RHEL ways to simulate or virtualize time

I am trying to get my machine to simulate or visualize time without changing system time so that I can run code under simulated/virtual time so that my timestamps are in the past and such. I know ...
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Can't start any VM's in virtualbox on Windows host

Something is wrong with my VirtualBox. I had no problems of starting VM's yesterday and I have not changed anything on the host or settings on the VM's. But today when I start any of my VM's, I first ...
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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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Virtualization of Windows 10 on Ubuntu 20.04 Server (virtualized)

I'm running a virtualized Ubuntu 20.04 server and I'm trying to virtualize instances of Windows 10 via KVM/QEMU. My issue is that every other OS I've tried to virtualize on this server (Windows 7, ...
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Can you just “cp” copy and make a backup of a virtual disc image?

Basically the tittle. I'm doing Linux From Scratch(LFS), I'm at the point of installing the system software. Before doing that, I want to have a backup of the virtual drive that I'm installing LFS ...
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Comparison between: Linux host Windows guest vs Windows host Linux guest vs 2 dedicated machines w/ KVM switch [closed]

I have the conflict that I do most of my work, software developing and data analysis, in Linux but there are a few applications I have to use which do not run well using Wine (specifically MS Word and ...
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891 views

How to clone physical system into a virtual machine?

I have a full system installed on my PC. (Arch Linux on a laptop) I need to test, edit, tweak this system (bootloader too) in a safe way because it is my workstation. Is there a way to easily** ...
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1answer
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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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How to get past “Loading Initial Ramdisk” hang after going from x86_64 to i686 cpu

Long story short, I have a Ubuntu 12.04 64-Bit Server setup as a virtual machine with VirtualBox (4.1.18). I migrated the guest machine from an AMD chipset (a gaming machine) to an Intel Xeon (server ...
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virNetSocketReadWire:1801 : End of file while reading data: Input/output error

Every time I start/stop a KVM, the libvirtd 3.0.0-4 throws the following error in syslog: libvirtd[3145]: 2018-08-07 21:00:19.699+0000: 3145: \ error : qemuMonitorIO:710 : internal error: \ ...
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KVM guests not able to ping each other

Ahoy friends. Currently i am running my Fedora 30 host, using Cockpit and cockpit-virtual-machines in order to manage my machines. I got my network interface enp35s0, and a vlan subinterface enp35s0....
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Share memory between a virtual machine and the host

Through shmget and shmat, I am able to access the data stored in one program from another program. Here's the gist of the code: key=ftok("shared.c",'c'); shmid=shmget(key,1024,0644|IPC_CREAT); data=...
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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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Black screens and logout on a Pureos virtual machine (Vmware)

I’m using PureOS on a virtual machine with Vmware Workstation 15 player. The installation seems to end properly but it actually stays in operation for a few minutes after which the screen becomes ...
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How to set up TAP to bridge Ethernet and emulator?

I'm looking to set up an emulator so that its emulated Ethernet interface acts like a real one connected to my LAN. For this example, I'm going to use the address 192.168.120.6 for the Linux host on ...
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An equivalent of Looking Glass where VM side runs Linux?

Looking Glass is an open source application that allows the use of a KVM configured with a passthrough GPU without an attached physical monitor, keyboard or mouse. In Looking Glass terminology, the ...
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How to redirect a port to a virtual machine (ssh tunnel or ufw)?

On the server, I run an image to a virtual machine running Linux. To access the virtual machine, I first connect to the server: ssh user@192.168.1.150 Then on the server I get to the virtual machine: ...
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How do I make it so that I can directly connect to the virtual machine from my computer? [closed]

From my computer I want to connect to a virtual machine that is running on a server: my-pc --> (server --> vitual-machine) First, I connect to the server: ssh name@server Only then do I ...
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1answer
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Can't use virt-manager after removing firewalld

I accidentally ran a sudo apt remove firewalld, and now trying to use virt-manager to create a virtual machine shows the following message: The name org.fedoraproject.FirewallD1 was not provided by ...
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1answer
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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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Debootstrap program exited with an error (return value 1)

While installing latest Kali 64bit on Virtual Box with all the recommended file partition settings, at Base Installation step, it showed this error: Base System Installation error: The debootstrap ...
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1answer
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VIrtualbox: NS_ERROR_FAILURE

Hi guys i recently installed Virtualbox on my Windowsfx 10 laptop. Before when i had Windows 10 on my laptop Virtualbox runned perfect. But since i did a fresh install of Windowsfx 10. And try to run ...
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Creating a port mirror on the open vswitch bridge

I have been trying to configure port mirror on Virtual bridge created using open vswitch. I have created the following ports on Bridge demo_bridge using: sudo ovs-vsctl add-port demo_bridge victim0 ...
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1answer
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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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How to: qemu usb passthrough

I am trying to bypass my Iphone8 from CentOS7 to a Debian VM I have running on Virt Viewer. I can see the Ihpone8 in CentOS7. Bus 003 Device 029: ID 05ac:12a8 Apple, Inc. iPhone 5/5C/5S/6/SE When I ...
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2answers
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How to send/upload a file from Host OS to guest OS in KVM?(not folder sharing)

I have to make a configuration file available to guest OS running on top of KVM hyper-visor. I have already read about folder sharing options between host and guest in KVM with 'qemu' and 9P virtio ...
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1answer
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2 guest VMs on the same host, remoting (via VNC/NoMachine) to each other

I have a very simple setup. Host is virt-manager running QEmu-KVM guests: Host: Ubuntu 20.04 (basic install) 2 Guests: Ubuntu Mate 20.04 (basic install) I have installed NoMachine (or VNC) on ...

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