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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Qemu Backing Files Question

If I'm creating a new.qcow2 qcow2 image based on a backing file (called base.qcow2) and the backing file is located on an nfs share. What happens if someone tries to modify, replace, or delete the ...
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Migrate a qcow2 image between storage pools

I have 2 storage pools. host_images (directory storage pool) remote_images (nfs storage pool) How do I copy qcow images from remote_images to host_images using libvirt APIs? I've tried using the ...
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86 views

How to load virtualbox video kernel module?

I have a virtual quantal (12.10) Ubuntu machine. Upon starting, it says in it its boot.log Loading VirtualBox video kernel module [fail] What is this component and ...
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1answer
215 views

Virtual always connected network interface with static IP?

How do I create a virtual, always connected network interface with a static IP on Linux? It must work when all my physical interfaces are disconnected. Looking for general information regarding this, ...
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1answer
562 views

Dual boot win/kali - virtualize the linux partition

I have one HDD. 2 partitions with Kali and Windows 8. GRUB is installed. Both OS work fine. I want to remove my Kali partition, and get it as a VM in my Windows 8 partition (I'm using VMware ...
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Linux LXC vs FreeBSD jail

Are there any notable differences between LXC (Linux containers) and FreeBSD's jails in terms of security, stability & performance? On first look, both approaches look very similar.
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VPS/Cloud configuration management automatization for small environments [closed]

What would be an appropriate tool/approach for configuration management of a relatively small number of VPS/VMs (1-5). Even though it's a small number I'm a big fan of "nuke 'n boot" in case of any ...
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1answer
194 views

virt-resize complains: “virt-resize: error: You cannot use --expand when there is no surplus space to expand into.”

I am resizing an installed KVM domain # resize the partitions virt-resize --expand /dev/vda2 --LV-expand /dev/vg_main/lv_root $VMFILE $VMFILE.tmp and virt-resize throws an error: virt-resize: ...
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1answer
474 views

What precautions should I take running Windows 7 on a VM on Linux?

I'm thinking of running Windows 7 on a virtual machine on VirtualBox on top of Linux, so that Windows is sort of a "self-contained sandbox" (especially in terms of data storage) for things that ...
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2answers
60 views

simplest way to get an ubuntu virtual machine w/ ssh server on my network

I have an OSX box and I'd like to just get a fresh install of Ubuntu to use remotely over SSH. That's all. But I'd like to get that on the same box without in anyway altering my existing OSX ...
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39 views

A Way Around: Host Accessing Guest in Internal Network?

folks. I have installed a Linux virtual machine in VirtualBox with 2 adapters: vnet0 is a host-only network and vnet1 is an internal network. I am able to get the IP address given by vnet0. ...
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1answer
161 views

Installing Virtual machine on a virtual Machine

I am implementing Oracle RAC using 11.2. For shared disc option and low cost, we are planning to use Virtual Machines. I have installed one virtual machine (PARENT) Specifications: Oracle Linux 5.8 ...
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187 views

Differences between primary and secondary VGA pass through in virtualization

Xen, and more recently KVM, allows you to pass a VGA adaptor from the host to the guest as either a primary or secondary device. Both links provide some explanation as to why passing a VGA adaptor ...
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1answer
3k views

Failed to load VMMR0.r0 (VERR_SUPLIB_OWNER_NOT_ROOT)

when I try to start a vm in Virtualbox, I get the error in the title message. I have already checked /usr/lib/virtualbox/VMMR0.r0 and the permissions are -rw-r--r-- 1 root root 785K Sep 21 2013 ...
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1answer
2k views

How do I setup an IP address on my virtualbox VM?

I have a VM which I run on VirtualBox like so ... $ VBoxManage startvm --type headless dev-006 ... and I can see that NIC1 is "Bridged" and setup like so ... $ VBoxManage showvminfo ...
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1answer
1k views

init: /etc/init.conf: Unable to load configuration: No such file or directory

Running Linux 6 on VMWare, I noticed this in the system message log: init: /etc/init.conf: Unable to load configuration: No such file or directory What's the cause of this error? How do I ...
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2answers
2k views

virtmanager- Unable to locate libvirtd daemon

I tried starting Virt-manager but get this error Unable to connect to libvirt. internal error: Unable to locate libvirtd daemon in /usr/sbin (to override, set $LIBVIRTD_PATH to the name of the ...
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0answers
225 views

How do I install Arch using an older kernel? No ISOs seem to exist

This is my first time in Arch, and I'm following this tutorial: http://www.youtube.com/watch?v=KSGWiFOp_7o&list=PLj97-HQdMXyZSvMD1xRTqPEeh4nSA6dpC which is great, except that I can't go any ...
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2answers
80 views

LiveCD “Remembers” Earlier Partitioning

Whenever I use VirtualBox to install a Linux distro, I usually install the LiveISO onto the hard drive instead of just using it as a live CD. However, sometimes the ISO doesn't install fully (usually ...
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969 views

kvm/qemu linux guest vm wont boot

host linux (kvm/qemu/libvirt) guest linux (slackware) the slack vm pauses just after Loading Linux-virtio...... message. it's stuck in paused state. i think i shutdown the host without shutting the vm ...
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2answers
3k views

Wireless bridged networking in KVM. Why is it so complicated?

I've been using VirtualBox (and sometimes VMWare) for years and I've never had any problem with the virtual network adapters, no matter if the physical ones were wired or not. I also played some time ...
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2answers
657 views

Which strategy suits best a user with a scientific background like me? (Linux Desktop, Dual Boot, Virtualization)/ (Fedora? Arch? Win?) [closed]

First of all, I've a scientific background and my professional work involves scientific computation: Lots of Python, Matlab, C/C++, TeX, Git, Java apps and some Julia, Parallel computing, web ...
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1answer
209 views

Using a minimal linux host for OSX and W7 VMs

I am a 3d artist (animation/modeling/sculpting) and I have a dream. I have licenses of zBrush the Autodesk and Adobe suites. My zBrush is a mac only licence; maya is both (I think), Adobe is for ...
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1answer
287 views

How to determine if and which linux security module (LSM) is available?

Is there a way to find out if and in case which linux security LSM (apparmor, selinux, grsecurity) is used by the kernel? To be more specific let's assume I am a legimate root user of the machine? ...
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121 views

Testing a Linux router on Laptop with one NIC [closed]

So, I have these instructions on converting my Linux machine to a router using (enable IP forwarding, NAT). Now my laptop has only one NIC and I want to test this setup. Any ideas how I can do this? ...
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346 views

Vagrant-lxc container not starting

Firstly I'd like to say that I'm new to LXC and I may have some problems getting the right idea of how the things should work. The thing is I'm trying to start a previously download vagrant-lxc box ...
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2answers
1k views

Where are my emails stored on CentOS 5.6

I have a CentOS 5.6 VM installation and currently have a handful of emails that I would like to get access to. When I run mail as root, I get: [root@dev mail]# mail Mail version 8.1 6/6/93. Type ? ...
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1answer
1k views

Virtualbox under Proxmox

On a Jenkins Master-Slave configuration and need to run on the slaves Kitchen tests on several jobs. Kitchen for those who do not know it, runs infrastructure on demand using Vagrant and VirtualBox ...
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0answers
265 views

Pentesting from a virtual machine, hiding the host

I want to install Kali Linux as a virtual machine in VirtualBox for pentesting wireless routers and network hosts. I want to hide my host OS, which is Windows 8, so that other machines see my computer ...
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1answer
22 views

Giving OVZ containers their own IP

Is it possible to give an OVZ container its own external IPv4 address? Say I hire a dedicated server and purchase extra IP addresses. Can I assign those extra IPs to the containers? If so how would ...
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129 views

sharing folders in virtual box

I'm trying to run a Linux Mint guest inside a Linux Mint host(both 64-bit). I've installed Guest Additions etc. But I'm not able to access the shared folder. sudo mount -t vboxsf kernel ...
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1answer
154 views

VirtualBox Package to DL for Linux Mint

I am trying to decide which edition of VirtualBox to download. I am currently running Linux Mint 16 Petra MATE and am wanting to install Windows 8.1 to a VM to use Visual Studio for some of my course ...
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1answer
2k views

Creating VLANs between network namespaces

I want to implement the topology shown in the figure below using network namespaces (ns1 to ns4). ...
0
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1answer
164 views

Problems setting up own Cloud Lab

I'm trying to set up an own Cloud Lab on a self-built server. Server details: Board: Gigabyte Z77MX-D3H TH CPU: Xeon E3-1245 v2 16GB Crucial Ballistix CL8 1600Mhz NETWORK: ALFA AWUS036H additional ...
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2answers
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What should I basically expect from access to an OpenVZ based VPS? [closed]

I'm going to buy access to an OpenVZ based VPS for the first time. I want to run common software, like apache, irc server, znc, a mail server etc. I'd like to get an idea of how the system will be ...
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2answers
2k views

How to Free Up Space in a Dynamically Growing qcow2 VM image?

This has happened to one of my VM's that's running CentOS under Proxmox. I copied about 40 GB of data into a VM. I then deleted that 40 GB data a day later. Now taking a backup of the same VM takes ...
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3answers
14k views

“echo 3 > /proc/sys/vm/drop_caches” - Permission denied as root

I am currently having some issues with the cache. It is a little too much right now so I wanted to clear it. I googled and found this little command: sync && echo 3 > ...
3
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1answer
2k views

virt-manager copy paste functionality to the vm

Anyone know how to get Virtual Manager to install copy-paste functionality to the Virtual Machine? Can't find anything on Google.
3
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1answer
576 views

Creating a private network for internal VMs

I am trying to configure a private network for use with my Xen VMs, in addition to the public network in use by another of the VMs (VM1, which has its own public IP). So far, I have the public side ...
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1answer
217 views

Install a basic CentOS VM on Fedora 19 with libvirt

I would like to install a CentOS 6.5 virtual machine on my machine, only with command line tools and basic networking capabilities, i.e a way to have http and ssh connections between the host (Fedora ...
0
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1answer
186 views

How to start a virtual machine filled with qemu-nbd?

I migrated a Windows OS (entire disk) to a virtual machine on another host (Debian with qemu and kvm). I used Selfimage to export the disk. On the host, first of all, I created an empty virtual ...
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2answers
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Installing Ubuntu-13.0 Desktop in Qemu

Following are the details of my system: Fedora Core-18, i686. I am trying to install ubuntu in the qemu. Following are the commands I executed: qemu-img create ubuntu.img 8G qemu-system-i386 -hda ...
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Connecting to a serial port with VMWare ESXi and Ubuntu

Using VMWare ESXi 5.0.0, having a guest OS Ubuntu 12.04.3, upgraded to the date 05 january 2014. I've added "Serial port 1" to the Ubuntu 12.04 guest OS (let's call it "MyUbuntuPC"). Serial port 1 is ...
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3answers
2k views

Having issues installing Kali Linux in Virtualbox

Trying to install Kali Linux in VB and it freezes. I believe I have the correct version and a good ISO because it comes up and allows me to navigate to "install" Once I press enter, all that happens ...
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178 views

Xubuntu 13.10 on Dropbox

I have a Mac OS X 10.5.8, and I would like to use Linux on a virtual machine. I use Dropbox, and the most modern version I can run on my PC is Version 4.1.8. I created a virtual machine running ...
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What software allows the change of runtime-environment, while keeping the same kernel running?

I know that with a GNU/Linux distribution you can switch between different distributions at runtime when they use the same kernel or the kernel is compatible between 2 or more different distributions; ...
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1answer
194 views

Run a GUI OS via a hypervisor from a Linux server terminal?

Is there a way to run a VM hypervisor, such as VirtualBox directly, from say, CentOS? Let's suppose that I want a high-efficiency server, but it can host guests with GUI-enabled OS's. Additionally, ...
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1answer
3k views

Mounting another VM's .vdi in VirtualBox

I have two VMs in VirtualBox. For exmaple, VM 1 runs Red Hat, and VM 2 runs Ubuntu. For the Red Hat VM I have redhat.vdi and redhat2.vdi, and for the Ubuntu VM I have ubuntu.vdi and unbuntu2.vdi. ...
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1answer
4k views

How may I Obtain a RHEL/CentOS in OVA Format?

My company has an internal cloud that provisions VMs either in an OpenStack (KVM) or a VMware (ESX) hypervisor. It already provides RHEL 6.4 on the KVM, but I've used up the max number of VMs from ...
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1answer
198 views

Why PowerVM LPAR CPU utilization is negative

For a specific case I compute an PowerVM LPAR CPU utilization to be a large number less than zero. I am fetching the lpar sample event using: lslparutil -r lpar -m P750 --filter "lpar_names=i5lp5" ...