Virtualization is the process of using software to create a virtual resource of something; usually, it refers to hardware virtualization, the act of running an operating system (referred to as guest) inside an host system.

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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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Vm doesnt show any gui

i have Centos 6 installed, it was work fine till today, but suddenly when i turned it on today my vms doesn't show any thing, all my setup are correct i know that for sure but my graphic doesnt work i ...
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2answers
28 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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23 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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3answers
325 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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0answers
20 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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33 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
110 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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22 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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1answer
22 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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16 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
91 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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25 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
53 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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0answers
396 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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44 views

Can i implement thin virtual desktop clients using KVM

I had read What is virtualization and studied basics of KVM virtualization and terms. not only sitting infront of PC and installing three or four guest OSes is there any other things i can do with KVM ...
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39 views

acedemic projects related to linux virtualization and security [closed]

I am B.tech student iam totally confused with the topic virtualization. but i selected linux virtualization security as a project in my college. please guide me. i tried in google but i found so many ...
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20 views

Differences between Kernel-based virtualization and Container-based virtualization [duplicate]

What is the differences Kernel-based virtualization and Container-based virtualization ?
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2answers
202 views

How to create user cgroups with systemd

I use unprivileged lxc containers in Arch Linux. Here are the basic system infos: [chb@conventiont ~]$ uname -a Linux conventiont 3.17.4-Chb #1 SMP PREEMPT Fri Nov 28 12:39:54 UTC 2014 x86_64 ...
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1answer
20 views

will libvirt don't create vnetX tun device?

When I create the vm instance using libvirt, it will create a TUN device named vnetX. I wonder would libvirt don't create the vnet device, instead, I use other method to create it.
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1answer
30 views

Virtualbox list vrde port for vm on commandline

I have a Virtualbox VM that is configured with VRDE for remote access using RDP. I'm familiar with how to set the vrde port, but for a given VM I have not found a way to query the current vrde port ...
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0answers
30 views

Can't Create Win 7 VM with RHEL 6.5 VMM

I have a server running RHEL 6.5 that I primarily run VMs on it. The VMs I run on it are all Linux, with the exception of one that runs Server 2008 R2. Yesterday, I attempted to install Windows 7 as ...
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2answers
49 views

Two virtual machine instance with same network on same host

Is this possible to have two (or more) instances of a virtual machine on a host with the same IP address (like 192.168.0.X)? What are the possible ways of implementing this? I need the two virtual ...
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1answer
203 views

Getting an already installed Android x86 partition to run on KVM

(Originally posted on SuperUser here, but posted here due to lack of responses.) I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set ...
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2answers
202 views

how to pass Ctrl-C in qemu

I configured Qemu's grub the following way: GRUB_TERMINAL="serial console" GRUB_SERIAL_COMMAND="serial" GRUB_CMDLINE_LINUX="..console=ttyS0" and run the Qemu process with "-nographic" command line ...
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2answers
216 views

What is a Linux container and a Linux hypervisor?

I looked at the stackexchange site but couldn't find anything. I looked at the wikipedia entry on Linux container https://en.wikipedia.org/wiki/LXC and as well as hypervisor ...
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1answer
1k views

Why is my Mac, upgraded from Mavericks to Yosemite, no longer giving VMware Fusion needed resources?

I have a Mac upgraded from Mavericks to Yosemite. When I tried to run VMware Fusion, I got an error stating: Could not open /dev/vmmon: No such file or directory. Please make sure that the kernel ...
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1answer
36 views

What are the diffence between virsh, virt-install, and virt-manager?

I know all of virsh, virt-install, and virt-manager can manage the virtual machines. However, what are the difference between the three?
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1answer
85 views

Archlinux VLAN internet access virtualbox

I need to configure Openstack on a Virtual Machine and for that I created an VLAN to support communication between controller and nodes. The problem is that I need internet access on this VLAN to ...
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44 views

Disable buffering in a VM configuration

I am executing some benchmark using a DBMS and virtual machines. And I am using this command free && sync && echo 3 > /proc/sys/vm/drop_caches && free on each Guest, and ...
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40 views

How to decrease the RAM and Cores for sometime

I have 9 VMs running Ubuntu 12.04.I am using resources from GENI ( Global engineering Network Infrastructure ) to set up topology and i reserved resources with the following configuration. RAM - 4GB ...
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1answer
104 views

host only network xen 4.4

I have one IP address (ipv4) and I am trying to install a domU (debian stable) on a dom0 which runs the latest xen 4.4.1 on debian testing. I have created xenbr0 bridge and it is mapped to my eth0. ...
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54 views

How to write shell script on VMDK to derive configuration

I have several VMDK files and I would like to write a shell scripts to derive configuration (i.e. No. of CPUs, RAM, NIC, HDDs Size, No of HDDs, etc.). How can I do this, or where do I start?
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1answer
574 views

setup kvm on a wireless interface on a laptop machine

I am trying to setup KVM in ubuntu 14.04 host machine. I use a wireless interface to access the internet in my machine. I have setup the wireless interface in my /etc/networks/interfaces as below. ...
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2answers
291 views

running qemu on Fedora20

With Fedora20 and built from sources qemu-2.1.1, I'm experiencing issues to run qemu with non-root privileges: % qemu-system-x86_64 -hda vdisk.img -m 512M -netdev ...
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282 views

Docker like solutions for OpenVZ containers

We have been providing OpenVZ containers(VEs) for developers working on some projects - this was done from a purely economical perspective. I have been asked to setup a Docker-like system within the ...
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1answer
975 views

virt-manager PCI passthrough gives error “No IOMMU Found” even w/ Intel IOMMU enabled

I am trying to set up PCI passthrough in virt-manager to grant my Debian Wheezy guest VM access to my laptop's Intel Centrino N wireless card. The Debian default kernel has Intel IOMMU enabled, and I ...
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45 views

Running proprietary firmware in virtualized environment, but not in host environment

I've got a fresh install of Debian Wheezy on my laptop, and for security reasons I would like to not have any proprietary firmware running on this system. However, I require the iwlwifi non-free ...
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1answer
39 views

Empty kernel processes on CentOS vps : 2 different servers

I'm not sure I'm asking correctly, or perhaps I'm just looking at the wrong things. I'm migrating from one CentOS Vps (on an OpenVZ box) to another CentOS VPS (on a VMWare box). VPS #1 = CentOS ...
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1answer
138 views

Run the Arch ISO in VirtualBox with shared folders

I am trying to use the shared folders feature when running the Arch ISO as a VirtualBox guest OS. The reason is that in the shared folder I have the scripts to make my persistent setup. After the ...
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137 views

PCI Pass through for gaming, Arch Linux

Okay, so I have attempted PCI pass through before, and failed, so I'm trying again but I'm looking for some tips, allow me to explain. I'm looking to use QEMU/KVM to build a W7 VM, this will be a ...
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0answers
305 views

GeForce GTX 660 as passthough device with KVM : error no iommu_group for device qemu-system-x86_64

I'm tryng to use my GeForce GTX 660 as passthough device with KVM. I'm reading this guide : http://www.pugetsystems.com/labs/articles/Multiheaded-NVIDIA-Gaming-using-Ubuntu-14-04-KVM-585/ I'm ...
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474 views

How to enable IOMMU on the debian sid Kernel

I'm trying to enable IOMMU on my debian sid and with this kernel version : root@ziomario-Z87-HD3:/home/ziomario# uname -r 3.14-2-amd64 the motherboard of my computer is : GIGABYTE Z87-HD3 this is ...
5
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1answer
368 views

How can I remove all my docker images?

Sometimes I just want to clear everything out of docker, and start with a clean slate. Is there a systematic way to just remove all my Docker containers & images? Containers $ docker ps -a | ...
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1answer
696 views

How can I remove a stubborn docker image?

I was trying to remove a Docker image as follows and could not figure out how to do this. List of docker images $ docker images REPOSITORY TAG IMAGE ID CREATED ...
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Setting up VGA Passthrough on Ubuntu with KVM : error no iommu_group for device qemu-system-x86_64

I'm trying to configure the VGA Passthrough on the Debian SID because I want to use Debian on the first monitor and Windows 7/8 on the other one. I have tried with XEN and with KVM but in both case I ...
3
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1answer
33 views

Real-time executive approach, can be run in desktop Linux?

With the real-time executive approach, a small real-time kernel coexists with the Linux kernel. This real-time core uses a simple real-time executive that runs the non-real-time Linux kernel as its ...
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1answer
535 views

How to migrate from Proxmox to VMWare?

I am wondering how it is possible to migrate a full hardware VM in Proxmox (qemu) to a full hardware VM in VMWare (vmdk). I have been searching all over the place, and it seems almost impossible to ...
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1answer
100 views

Difference between AIX and other Unix flavours [duplicate]

I am learning AIX 6-7 for practice, is there any alternative unix flavour which could be quite similar to AIX which could be run on a VMWare or Virtualbox for practice? Also, if there is any ...
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2answers
95 views

how to access the running VMs?

A colleague of a friend of mine established a voluntary project for a gaming union. But the problem now is, that the person is unavailable and I donĀ“t know how I should access the running VMs. I spent ...