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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kvm virtual manager connection failed

I installed kvm package in the centos7 i am getting this problem how to solve this. full error is here Unable to connect to libvirt. no connection driver available for qemu:///system Libvirt URI ...
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Prioritize virtual machine bandwidth

I installed a Windows Server 2012 virtual machine (VM Ware Workstation) on my Debian server that I rented (to which I have SSH access only, and which is in another city with over 1 GB bandwidth) to ...
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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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61 views

Error installing Ubuntu on VirtualBox

I'm trying to install many different versions of Ubuntu (12.04/14.04, amd64/x86, server/desktop, etc.) on VirtualBox 14.3.26 on OSX 10.10 and I'm getting the following error: [ 0.000000] Fast TSC ...
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97 views

Configure KVM/QEMU with TLS?

New to virtualization and kvm and I have a problem when i try to create a virtual machine with spice: virt-install --name Windows-7-x64 --ram 2048 --disk path=~/kvm/images/win7.img,size=50 --vcpus=1 ...
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52 views

Oracle virtual box share folders when executing oracle command

I'm using Oracle Developer Days virtual box, which is a Linux distribution by Oracle for development environments (link). Not sure what distribution is it, but in case it was relevant: ...
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1answer
1k views

Problem runing vmPlayer on fedora 21

First of all: Hello :) And then: 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 ...
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100 views

Running Mac OS X under KVM/QEMU

Note to be removed in the future, so as to avoid confusion from answerers and mods edit: Forgot to add in the note, if anyone thinks this is the wrong stack-site to post this, please comment on why, ...
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91 views

How can I configure multiple tap interfaces for a single KVM virtual machine

I am trying to setup a VM using Linux KVM for a F5 BIG-IP VE deployment (used in a lab) ...
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1answer
24 views

Boot to non bootable disk using Openfirmware

I tried to virtualize (VIOS partition) Debian 7.8 on IBM 9133-55A (powerpc) server. For some reason both yaboot and grub failed to install on the virtual hard disk. Now I want to start the kernel ...
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649 views

docker - how to run x desktop in a container?

I'm trying to set up my Linux machine to run multiple guest OSes, one of those being a Windows VM, and another a Linux container. The goal here is to prevent me from messing up the host system, while ...
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45 views

Arch Linux openSSH frequently drops connection

I'm running a VM using Oracle's VirtualBox. The OS is the latest version of Arch, 64-bit. For some odd reason, every so often (frequently enough to be very annoying and making it almost impossible ...
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718 views

Linux GPU Pass-through Virtualization - Verify wich component causes trouble

GPU Passthrough Virtualization with KVM or VirtualBox For a research project I need to passthrough a PCI GPU from a Ubuntu Host to a Windows 8.1 guest. We need to test a certain setup, where the ...
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62 views

Resolve Host's IP on VM

I have kind of tricky situation. I have monitoring tool where all my hosts and their VM's (with IP's and so on) are listed. But what I need is to resolve on which host(need it's ip or hostname) this ...
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2answers
64 views

Minimal virtualization environment

I'm using a virtual machine running Windows for development purposes inside a Ubuntu host (I also use the Ubuntu part for my regular activities, but not both at the same time). As I need to compile on ...
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25 views

Xen ERROR Couldn't find xen kernel for Ubuntu tree

xen-4.2 running on server with multiple CentOS running guest, But when i am trying to install Ubuntu i got following error. How do i install Ubuntu on CentOS Xen Server? [root@example ~]# ...
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108 views

Converting .vhd file to .raw - File is too small and does not boot

I have a Hyper-v .vhd file I am trying to convert to .raw for Proxmox. However every time I convert the size is less than half of the actual disk space used and when I import it doesn't boot. I ...
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1answer
33 views

Changing the default resolution with a virtual machine?

I'm using VMware on windows to run Knoppix but the default resolution is too small and changing the resolution each time I load it with su xrandr is annoying. Is there a way to change the default ...
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65 views

what is the value for setting a hostname in installation of oracle enterprise linux r6u5 should have?

I am installing oracle linux r6u5 for my personal use in vmware workstation. While going through installatio i came to a point where I have to enter hostname, format specified init is ...
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1answer
145 views

No cursor/caret in Linux VMC under Windows Hyper-V?

I have just installed CentOS-7, Minimal Installation, into a Hyper-V VM under Windows Server 2008 R2. When I Start the VM from Hyper-V Manager it opens a window it calls Virtual Machine Connection, ...
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149 views

(virt-manager:4796): Client failed to connect to the D-BUS daemon / Unable to connect to libvirt

I would like to boot and run Windows 8 with kvm or xen while I'm running Debian Wheezy. Actually I have installed Windows 8 on the external USB disk and Debian Wheezy on the hard disk sata. I'm tryng ...
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1answer
203 views

Question about CentOS and KVM virtualization and PCI Passthrough

I want to replace Windows Server 2012 R2 and Hyper-V on my homeserver with CentOS and KVM. My plan is to virtualize one Windows 8.1 machine and several smaller Linux machines like on Hyper-V, there is ...
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196 views

Using of qemu-system-x86_64 with key -enable-kvm on VirtualBox

I have windows 7 as host. I launch virtualbox with ununtu 14.04 on my Windows 7. I try to launch debian inside Ubuntu: qemu-system-x86_64 -enable-kvm -hda disk.img -boot c -m 256 -localtime. Another ...
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1answer
34 views

CentOS Black Screen after 4+ hours of indexing

I am running a CentOS virtual image on virtual box. It has liferay and solr installed on it and I am trying to index a Lar file that is 50+ MB of metadata. This is estimated to take more than 12 hours ...
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23 views

VirtualBox state suddenly SEEMs to have been restored to an earlier time

I have CentOS 7 installed on my Windows 8.1 VirtualBox, and file-system sized 30Gb. It worked fine until this morning, then the storage became full (due to Downloads and Projects). I tried a tool ...
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33 views

Cloning a drive larger than your own

I made this nice backup system to turn drives into vdi's and put them on our network share. Then the next day my boss walks in with 20 new machines to replace our old ones, they have 2TB drives. How ...
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68 views

Linux Desktop VDI from thin client

I checked VDI Solutions Like VMware Horizon, Citrix Etc. all gives Windows VDI. Is there any solution I can load Ubuntu Desktop Or Centos Desktop image from any thin Client
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1answer
220 views

Unable to connect to internet from Centos VM

I am using VirtualBox 4.3, I have installed centos 6.3. I have two adpaters attached. 1) NAT 2) Host-Only I want to be able to setup a cluster of 3 machines which can talk to each other and also be ...
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94 views

SSH to a virtual machine

I recently installed a Linux (Mint 17) virtual Machine on a Windows 7 PC. In order to be able to SSH to this virtual machine, I had to define a few rules and redirect ports as explained in other posts ...
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85 views

Unable to get kickstart file from locally hosted http

I'm trying to get a vm up using a kickstart file. However, whenever the virtual machine initalize, it says it is unable to located the kickstart file from the location provided. Code to build vm: ...
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3answers
663 views

What are benefits and downsides of unprivileged containers?

The technical explanation of what is unprivileged container is quite good. However, it is not for ordinary PC user. Is there a simple answer when and why people should use unpriviliged containers, and ...
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56 views

Using ks.cfg with virt-install?

I've been trying to get a virtual machine working with a cfg file on centos but unfortunately, I'm getting the error that ks.cfg file does not exist. Below is the command I ran to enable the VM. ...
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54 views

Authenticating a virtual machine against a git server

I have a CentOS 7 VM hosted on a Scientific Linux machine (Both branches are Red Hat). I'm using docker as the SW to emulate CentOS over SL. Communication between both is done through a bridge (a ...
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97 views

CentOS 7 boot hagn in VmWare

I have installed CentOS 7. It was working fine until today that it hangs. After several initial lines of ...driver cache write through... it goes to the next black screen with a _ keeps flashing. I ...
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1answer
60 views

Understanding ssh X11 forwarding

I have a rather odd setup I'm trying to get working. I have an Ubuntu install running in a container (through Proxmox). The host computer is CentOS. Neither server is running an X instance. My host ...
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1answer
512 views

Qcow2 snapshots - snapshot for disk vda unsupported for storage type raw

I am running a KVM server (Ubuntu 14.04) and would like to take snapshots of my guests. I was reading how about how to do that in this article. It seemed as if I should be able to take a snapshot of a ...
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69 views

kvm console not working at login [centos on centos]

When I run the following $su $virsh console myvm I keep getting login incorrect , even though I'm typing the correct password. In fact, it does work if I use virt-viewer. What could it be?
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88 views

Home server bottleneck (filesystem server)

I am trying to set up a filesystem server, so that I can use my various laptops to transparently mount a directory containing many VirtualBox VMs, some of which run full graphics environments. I will ...
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1answer
33 views

Virtulisation IPTables Rules

I haven't been able to find a solution this as of yet. I'm not very experienced in IPTables so any support you can provide will be appreciated. I have a server with a few VMs on there. The main node ...
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33 views

OSX under Linux VM on Macbook PRO

I have a Macbook Pro, with Parallels installed, within which I have OSX Mavericks, Windows 7, and Ubuntu VM's. Its possible to install OSX Mavericks as a VM, because the hardware is a Macbook Pro. ...
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1answer
163 views

How to install UNIX In a virtual machine?

I got a laptop running Ubuntu 14.04 and I want to install some abandonware in virtual machines with VirtualBox and I chose to begin with AT&T UNIX 4 Version 2.1. I allocated for this machine 512 ...
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270 views

Create disk space on Vagrant/VirtualBox guest

I am looking to expand my VMs storage space and have done it the following way: Moved Vagrant to an external hard drive Reformatted the box to .vdi, resized it, formatted back to .vmdk Re-added the ...
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75 views

Configure networking settings in SL 7

I installed the last version of Scientific Linux on to VMWare Workstation 10 (on Win 7). I downloaded SL-7-x86_64-DVD.iso on the SL website. After which, I don't have internet connection whereas when ...
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1answer
29 views

libvirtd and filtered ports

I am new to virt-manager. After having configured a virtual network (new interface virbr0) with 2 VMs that should be able to communicate, I discovered that most ports are filtered. For example, the ...
3
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1answer
194 views

virt-manager: is it possible to assign specific IP addresses to certains VMs via the virtual DHCP?

using virt-manager quite successfully. I am wondering if it's possible to specify in the virtual DHCP server, that some virtual machines will have a specific IP address (maybe via MAC address ...
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1answer
92 views

Installing generic-logos and generic-release on Fedora

The guidelines for Fedora remixes suggest to replaces packages fedora-logos, fedora-release, and fedora-release-notes with the generic-* equivalents when making a remix. Most tutorials online focus on ...
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80 views

GParted doesn't recognize my newly resized vdi

Before I describe the problem, I'd like to specify that I'm not confused about the size of the partitions (they haven't been extended yet, so of course they haven't grown) but the size of the actual ...
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Multicast is not received using Java on Linux

Setup is as follows: host windows machine, 2 VMs with a Host-Only Network adapter and a NAT adapter. Java program on one VM that sends a UDP packet to the following address ...
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769 views

How to setup unprivileged LXC container without reboot?

I am writing some bootstrapping scripts, and I can't get usermode LXC containers working on vanilla Ubuntu 14.04 headless without a reboot. Here is what i do. First, I download and install Ubuntu ...
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135 views

Wine or VirtualBox for Windows proprietary software installation?

I just bought a Windows proprietary software which appears to store license keys in their internet database right after installation. After purchasing, I was provided with 1 license key, and it is ...