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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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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86 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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96 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
35 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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35 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
170 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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331 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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85 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
33 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 ...
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1answer
235 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
100 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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93 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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72 views

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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808 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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2answers
145 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 ...
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0answers
184 views

vmxnet3 multiqueue support in vmware workstation

I'm working on an application based on RSS multiqueue(receive side scaling), and testing it on vmware workstation, but found that vmxnet3 nic have problem with RSS. My linux virtual machine has 4 ...
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1answer
75 views

Memory Required for SSH-only Linux Setup

I am attempting to set up a minimal Debian or CentOS installation for internal network access. The purpose of the setup will be to allow SSH access into the rest of the internal network—that's it. It ...
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98 views

Proxmox server VM growing than what i have assigned for VM disk space

I have only 2 VM's in one of the SSD hard disk server, Hard disk size was just 120 GB. I have assigned 32 GB for each VM's but now there is only 1 GB space left in /var/lib/vz. While listing the size ...
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81 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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1k 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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50 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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200 views

Virtualbox vboxmanage clone does not show up in virtual machine list

I have a virtual machine that I am cloning with the command line interface to virtualbox like so: vboxmanage clonevm origVM --name origClone However, the clone is added to the directory ...
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1answer
78 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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36 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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1answer
76 views

How do I install sfx files in Debian [duplicate]

I want to install a virtual machine, and i need to install a SFX file. I know the command for Ubuntu is chmod +x filename.sfx But I don't know the command for Debian. Does any one know? Please ignore ...
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2answers
93 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
43 views

Understanding NAT concepts

I began learning networking on Linux, and I am looking for a way to associate a particular IP to a particular MAC address (i.e. a way to edit the NAT table?). Actually I am trying to assign some IPs ...
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103 views

centos virtual machine not registering with intranet dns server

When I am creating a Ubuntu virtual machine on virtual box it automatically registered with DNS server in my intranet network, it has both intranet IP and domain name. When creating CentOS virtual ...
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1answer
311 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
689 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
695 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
157 views

Share wireless card with Arch Linux on VirtualBox

I'm developing a software that needs to access the list of wifi networks in Arch Linux. This is easy, just run iwlist scanning. The problem is: I'm running VirtualBox on Mac OS X and when I run this ...
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100 views

Multiple domains with one public IP?

Hosting multiple domains on seperate servers but only one public IP address with ProxmoxVE... How can I do this with an easy and quick solution? The individual servers behind the router should be ...
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1answer
3k 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
78 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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31 views

Set screen resolution on Boxes

I'm using Boxes to try out Arch Linux in a Virtual Machine. It works fine but the screen resolution is 1024x768 whereas my screen has a resolution of 1366x768. How can I make my virtual machine use ...
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1answer
104 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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1answer
64 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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42 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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273 views

Keyboard doesn't working in boot menu on VirtualBox

I've just trying use CentOS 6.5 LiveCD on VirtualBox but all my attempts fail. When the system starts I see "Automatic boot in 10 sec ..." - if I do nothing, the message disappears after 10 seconds ...
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2answers
2k views

Why I can't set on the Debian 64 bit on the Virtual Box

I have installed the Virtual Box, and I would like to make a Debian virtual machine but I can't do this because my Virtual Box don't allow me to choose Debian x64. My computer and the .iso file are ...
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80 views

Running centos on a virtual machine as a webserver

I have taken the VM image of our webserver (CentOS/jboss) and would like to run it locally on my mac as a virtual machine so I can use it as a webserver when I am offline - I am using VM Fusion. The ...
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1answer
181 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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1answer
70 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
2k 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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3answers
595 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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2answers
967 views

systemd-timesyncd.service inactive on Arch on VMWare

On Arch Linux running as a guest OS on VMWare Fusion, I noticed the system time of Arch falls behind when I sleep the host OS and never gets back in sync. It appears systemd-timesyncd is loaded but ...
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2answers
351 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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0answers
703 views

Udev rule not working on Debian

I can detect and mount my USB drive on my Debian VM machine. And the first post here - explained below - works on my Ubuntu machine. Should not it work on Debian too? It doesn't of course. Why is ...