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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compile linux into a binary to run a VM

I know there is a project that allows one to compile linux kernel into a (linux executable) binary that can be run from the linux host to create a guest VM.... I always forget the name of the project. ...
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KVM networking :: forward all traffic from host to VM1 - PFSENSE

running KVM on Centos - I want all traffic to be routed to my Pfsense VM. I can achieve this by using IPTables, but my question is, is this an ideal solution considering my VMs will be behind the ...
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Warning: KVM kernal modules are not loaded. Your VM may perform poorly?

Related post - Creating VM's using kvm. Error: Unit libvirtd.service could not be found? I am seeing below warning, should I ignore it or try to fix it. Then how to fix it?? Below is the lsmod output ...
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Creating VM's using kvm. Error: Unit libvirtd.service could not be found?

TLDR; On Ubuntu 20.04.1, I am trying to run VM's using KVM. After installing the required packages, I still get below error: sudo systemctl status libvirtd Unit libvirtd.service could not be found. ...
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How to fix “VirtualBox VM quit unexpectedly” when running my Ubuntu 20.04 LTS VM on MacOS Catalina 10.15 in VirtualBox?

I am running VirtualBox 6.1 on Catalina 10.15.6 and when I start my Ubuntu 20.04 LTS VM it says "VirtualBox VM quit unexpectedly". How can I fix this? The Apple report is below Path: ...
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How to emulate linux within linux without virtual machine

How to create clean, isolated enviroment within linux without installing virtual machine or donwloading iso file. Is it possible?
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Does libvirt support vlan aware bridges?

I am using libvirt/kvm in Debian 10 with a vlan aware bridge device, and I am stuck trying to configure the network interfaces for my VMs. Does libvirt support vlans? When I do a search the only ...
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1answer
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Why is a bridged TAP interface receiving a link local IP address?

I am using libvirt with qemu-kvm on Debian 10 and I have created a virtual machine with bridged network, and it has created a TAP interface named vnet0 which has been added to my bridge. What I don't ...
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Configuring networking with QEMU for OpenBSD 6.7 guest on Debian Buster host

I have a host machine running Debian 10 and am using QEMU to run an OpenBSD 6.7 guest (amd64). My current invocation of QEMU is as follows: $ qemu-system-x86_64 -m 512 -drive if=virtio,file=my_image....
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Best approach to create safe environment to install TensorRT

I would like to install TensorRT on a Linux machine with Ubuntu 18.04.4 to which I connect via ssh. I would like to create a virtual environment or similar to not mess with the machine. But as I am ...
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Google Chrome starts on a Virtual Machine on Ubuntu 20.04 per default as incognito, how to change that?

I have two virtual machines and on one it does start in incognito mode per default and on the other it does not. There is not a thing that i installed differently as far as i can remember. What could ...
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Google Chrome Extension not starting on cloned Linux Ubuntu 20.04 Virtual Machines

My own Google Chrome Extension should start when the Google Chrome browser is opened (via crontab xvfb-run), but it does not. The Extension is used via Developer mode and is not published in the ...
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Zscaler connection error inside windows VM

We have the same problem weel described in this post, but there was no answer :( Zscaler VPN disconnects inside VM Just one user can connect to zscaler from the VM, the others disconnect automatically....
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Networking issues on Proxmox VMs (but not containers)

Everything was working well until I changed the IP address of my router/gateway/DHCP server <- same device and IP for all. After changing the routers IP my Debian install "host", Proxmox ...
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xen and the support for spice GL

To make a long story short,I tried to pass through my two kinect 2 devices from ubuntu 20.04 to a two qemu / kvm virtual machines,where on the first one I have also passed through my RTX 2080 ti and ...
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Can’t create VM in Virt-Manager due to unavailable storage device?

When I try to create a VM with libvirt, upon reaching the screen that says to allocate storage space, it always says it has an unavailable amount of GiB and doesn’t let me allocate space. When I ...
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how to get a more stable version of the qemu driver for the usb 3 controller

I'm trying to connect two kinects 2 to a two different qemu-kvm virtual machines. On the first one VM I have passed the IGD video card from ubuntu to windows 10,following this tutorial : https://blog....
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Should i install Kali linux OS as a virtual in a vitual machine, use a live USB stick or should I Dual boot my PC [closed]

Recently, I have started performing penetration test lessons. My PC(HP PROBOOK) has a pre-installed windows 10 enterprise. A friend advised me to use Kali Linux. However, I need to run both OS in my ...
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Same vs different host-guest architecture virtual machines performance

I have a plan to run multiple guests inside an x86_64 host to provide various small, simple services. The guest OS of choice is OpenWrt, which is lightweight but still get the job done. OpenWrt ...
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5answers
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“invalid signature” errors installing Arch linux on VirtualBox 6.1

I was trying to install Arch Linux, and everything was working so far. I downloaded the iso, created the profile on Virtualbox and booted the iso, successfully connected to the internet, updated the ...
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Cannot get “apt-get install” or “apt install” to work on Kali Linux VM

I recently downloaded one of the prebuilt Kali Linux VMs for VirtualBox (64 bit), and was trying to install the library python3-pip onto it. However, the commands "apt-get install python3-pip&...
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1answer
191 views

VPN server inside of a Strato vServer

I have a Strato vServer with a Ubuntu 18 OS running on it and I try to install a VPN server on this Server by using this guide. But I got the following error message after running service openvpn@...
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1answer
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VirtualBox - Centos

I am new to technology and am trying to learning linux administration with Linux Academy. I am following the Linux Essentials course and they are showing me how to install CentOS 8 on VirtualBox. I ...
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Guest VM not able to access internet and routerGW via br0 in Centos7 KVM environment

I have setup KVM environment over VirtualBox (nested Vt). The guest VM Ubuntu can ping VM host Centos7 and vise-versa but not able to access internet and not able to ping my InternetLANrouter gw (192....
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Add internet to bridge with NAT [duplicate]

My setup is several VM's, with a local subnet (192.168.10.0/24) Host machine is 192.168.10.1 (br1) (or 10.30.0.7 interface with inet) it runs a DHCP server to assign my VM's their IP's. I don't want ...
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Accessing USB GPS device from Python program running on virtual server

I have a ublox ZED-F9P GPS connected to the USB port on a Raspberry Pi that is successfully working with version 3.19 of the GPSD library. I can boot up the Pi and see the GPS info from cgps. I have a ...
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My co-worker deleted /usr/bin by mistake

I know it is my fault to authorize him as a superuser, and I don't have enough knowledge about CentOS 7. As I wrote in the title, our VPS which runs CentOS 7 lost /usr/bin by mistake. And the server ...
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1answer
741 views

Bridging WiFi through `network-manager`

I am trying to setup a bridged network between my Ethernet, Wifi, and (future) virtual machines. I am currently trying with NetworkManager because it's already managing the networking on my Debian ...
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2answers
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SSH Secure Copy Denied/Timed Out

I'm relatively new to the Linux game. I have an SSH connection established with a remote host and attempting to secure copy (scp) from remote host to my local machine. I'm running Linux Ubuntu on ...
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How to convert a sda image (SuSE 10.3) to a valid vdmk-file (VMware VM )?

How to convert a sda image (SuSE 10.3) to a valid vdmk-file (VMware VM )? I have created with "dd" comand an image from the "sda" on a running SuSE 10.3 computer. Now I want to ...
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What's the purpose of kvm, libvirt and libvirt-qemu groups in linux

I wanted to play a little bit with KVM on my Debian, and I installed the needed tools. The three groups showed up in the /etc/group file: kvm , libvirt and libvirt-qemu . What's the purpose of each of ...
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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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LVM stripe configuration and external/VM snapshot could cause issue?

I was thinking to migrate a single virtual machine, CentOS 8, with a lot of data to a software raid configuration with 4x LVM striped disks to improve performance. The virtual machine is on top of ...
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1answer
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Cannot install Cinnamon on Debian. Is this environment compatible with it?

One year and half ago, I tried to install my new Debian 9 computer with Cinnamon : it failed and froze at installation. Because I had no Linux knowledge I installed Gnome instead. Today, I am on ...
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Direct to virtual machine

I started hosting a server in a data center. They give me an IP address Currently, virtual machines running on the Proxmox base cannot access the internet. Before the data center, I wrote the DMZ ...
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1answer
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Is Linux behavior in VirtualBox a more or less reliable indicator of physical installation behavior? [closed]

I'm a Linux newb, I started out with a dual-boot install of Ubuntu 18.04 on an old Macbook that natively runs OS X El Capitan. I've found Ubuntu rather frustrating, first it was lots of hang issues, ...
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guestfish write file to disk image, is it have default domain?

I am about to run android Oreo (8.1) on a Debian host. I am trying to insert (upload) a picture to qcow2 sd-card image, later will be use by QEMU. I know the easiest solution will be utilizing google ...
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xen guest gives the message “guest has not initialized the display (yet)” and it is freezes there forever

I'm a new xen user. I'm learning how works the xen hypervisor that I have installed on ubuntu 20.04 with the command : apt install xen-hypervisor. I want to boot the phisycal installation of windows ...
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1answer
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Gateway is reachable from the vm but the other machines in the network are not reachable (Destination host is not reachable)

I'm pretty new in the field of virtualization. I'm using esxi to manage my virtual machines. I have 2 networks, one is the local network with the gateway 192.168.0.1 and the other is the main network ...
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1answer
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virtio vs e1000 vs rtl8139: what's the difference?

When creating a virtual machine on Ubuntu, I have a choice between three device models for the virtual network interface: virtio, e1000 and rtl8139. What is the difference between the three? In other ...
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How to get SPICE guest agent work in TTY?

Just installed a plain Debian without any Window Manager as guest OS from virt-manager with spice-vdagent package provided. systemctl status spice-vdagentd says it's active (running), but guest does ...
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How can I add more than four disk images to qemu?

Qemu fails when I try to add more than 4 disk images using -drive file=...,index={0..3},media=disk,format=raw. The error I get for each additional drive is similar to the following: qemu-system: -...
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1answer
270 views

Ubuntu Multipass mount command not working

Recently I installed multipass on my mac. I've been trying to mount my home directory to my ubuntu VM. When I mount my home directory with multipass mount $HOME test it works perfectly and the ...
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Access to VMs when host is under a VPN

I have a host machine running 4 VMs with KVM/qemu. The VMs are connected to host using NAT network config. Each VM has a website running. To access the websites from outside the host, I had to assign ...
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FreeBSD VM - no networking

I was setting up a FreeBSD VM, and after running through the installer and rebooting, I have no internet on the guest. I'm using IPv4. ifconfig -l returns vtnet0 (which I think is just the name of a ...
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How to make programs VM-aware in Arch Linux? [duplicate]

I'm running Manjaro on my main system with a Manjaro VM in Virtualbox (will probably set up for Arch in the future). Most of my configs and setup scripts are shared between the native and VM systems. ...
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VirtualBox - VMDK sync between host (Ubuntu) and guest (Windows 7) system

In VirtualBox, I successfully linked my physical drives to my guest system and can access these without any problems. Unfortunately, if I make any changes on the drive (no matter if I do this on the ...
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KVM alternative for Xen XM-FLASK

Because of PCI DSS requirements we need to manually compile Xen with the XM-FLASK module and set the hypervisor to enforced. Since I'd like to consider using KVM instead, I was wondering if there's a ...
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2answers
38 views

what virtual memory manager in Linux

what is the purpose of the virtual memory manager in Linux and how that differs from traditional ‘swap’ on a Linux machine.
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fail to install packages into image via virt-customize?

I've just got this issue recently, before that I can install zsh, nfs-common to bionic image successfully. I tried to downgrade libvirt to 5.9 but no luck. I download image from here libvirt 6.4.0-1 / ...

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