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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How to extend an ext3 partition over LVM inside a file (virtual machine)?

I need to extend the root partition of a virtual machine (VM) using LVM (Logical Volume Manager). I can afford a few minutes of downtime so a VM shutdown/reboot is fine. The virtual hard disk is in ...
7
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4answers
11k views

Booting the already installed Windows from the VirtualBox installed in Ubuntu

I want to boot the Windows which is installed in laptop's internal harddisk(/dev/sda1) from the VirtualBox installed in my Ubuntu. Can somebody tell me how to do this in VirtualBox.
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4answers
4k views

Lightweight isolated linux environment

I want an isolated (guest) Linux environment on my computer that I can mess up without worrying about the host. E.g. install a lot of stuff from source without package management, pollute environment ...
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3answers
676 views

Problem with mount namespaces under Fedora

I've run into an odd problem regarding mount namespaces on Linux. I have two systems, both X86_64 running kernel 3.2.3-2 under Fedora 16. I am attempting to mount a tmpfs filesystem in a child ...
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0answers
33 views

How to access the data stored in guest operating system(i.e Virtual machine) from Host system [duplicate]

Possible Duplicate: Share memory between a virtual machine and the host I wanted to access the data stored in virtual machine from my host machine. I know that each VirtualMachine will have ...
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4answers
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Share memory between a virtual machine and the host

Through shmget and shmat, I am able to access the data stored in one program from another program. Here's the gist of the code: key=ftok("shared.c",'c'); shmid=shmget(key,1024,0644|IPC_CREAT); ...
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6answers
316 views

How can I be sure that my server is not virtualised?

How can I make sure that my Linux server is running on a non-virtualised real box? This is the scenario I am thinking of: I install some distro on a rack-mounted server, I rent some rack space on ...
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2answers
3k views

Fast X for LXC guest on localhost?

How can I run X apps inside an LXC container efficiently? ssh -Y guest is too slow - there is no graphics acceleration with ssh -Y - everything has to travel over the virtual network with the ...
2
votes
1answer
371 views

Virtual machines on different X servers

Is it a good idea to run virtual machine on a different X server? I can switch between them using Ctrl + Alt + Fx shortcuts. If my default X server hangs/crashes, I can still continue to work with the ...
2
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2answers
1k views

strange logs in /var/log/messages

My /var/log/messages contain lots of messages like this: Jan 22 05:45:05 vm kernel: hdc: drive_cmd: status=0x41 { DriveReady Error } Jan 22 05:45:05 vm kernel: hdc: drive_cmd: error=0x04 { ...
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votes
10answers
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How to automatically start and shut down VirtualBox machines?

I need to run a software system that is intended to be installed as an appliance on a dedicated machine. In order to save energy, I plan to run the system on a VirtualBox VM instead. The host is a ...
2
votes
1answer
89 views

Access times for different partitions on same hard disk

I have partitions, /dev/sda1 and /dev/sda2. / is mounted on /dev/sda1, while all other data is on sda2 which has more size allocated to it. I want to save the virtual machine images (VirtualBox ...
8
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1answer
717 views

Lightweight virtualization on Linux with user isolation

What Linux-on-Linux virtualization technologies provide user isolation? Specifically, I want root in the virtual machine not to have any privilege on the host. This was not the case for LXC, but was ...
5
votes
8answers
2k views

WebGUI for Virtualization?

Are there any virtualizations that can be accessed via a WebGUI too? I mean the administration part is enough on a terminal, but we need a virtualization/webgui solution for "customers". So that ...
2
votes
1answer
5k views

How to check if VT-X is enabled in BIOS?

How to check if VT-X is enabled in BIOS? I have vmx in CPU flags, and no access to the BIOS. (I need to install a KVM VM on RedHat Enterprise Linux 6.1).
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2answers
176 views

A reliable and free way to use Linux on Windows, multiprocessor and x86_64

I need a reliable and free virtual machine to run Linux on Windows, multiprocessor and x86_64. I need a good environment to compile and run ffmpeg and libvpx. I have used Mint Debian under Virtual ...
7
votes
3answers
10k views

Which *nix distro is most lightweight for running virtual machines? [closed]

EDIT: This question was expanded to include other Unix-like distros such as Hurd and BSD. Before anyone wonders, I did read related questions and answers; I think I have a sufficiently unique ...
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2answers
8k views

Unable to boot VM: Error 13: Invalid or Unsupported Executable Format

I used VMWare vConverter and everything converted fine, but when I try to boot I get an error: The physical machine boots correctly, so I don't think it is a source machine issue. I am not sure why ...
3
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1answer
1k views

Limit process resource consumption in CentOS 5 (2.6.18 kernel)

I would like to limit the resource (CPU, Memory, and network bandwidth) consumption of processes on the same server. And it will be good if I can migrate processes from one server to another. I ...
2
votes
1answer
663 views

Do I need hardware support for KVM for virtio paravirtualisation

Unfortunately I need to run virtual system on the machine without hardware support for visualisation. From kvm page I read that kvm is needed however it is not mentioned whether they mean the kernel ...
4
votes
1answer
6k views

CentOS doesn't know what the internet is

So I've done my share of investigating this problem... I just recently created a CentOS 6 VM on my LinuxMint box using VirtualBox. I left all the recommended values the same upon creation (8GB HDD, ...
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0answers
150 views

VirtualBox appliance import locks up system

I have a Windows Vista x64 appliance that I am trying to import into the Open Source Edition of VirtualBox on Linux Mint 11 x86-64. The ovf file is 21.3 GB in size. The problem I am having is that ...
3
votes
1answer
244 views

Custom live distro - ways to detect it is running inside virtual machine (or prevent running in VM altogether)

I am creating a custom live distro that will be a specialist work environment for those of my employees that are on the road. I am looking for ways to detect or, ideally, prevent my live distro from ...
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votes
2answers
4k views

Mouting a kvm qemu disk image with multiple partitions

I am trying to mount a KVM-qemu disk image with this command: sudo mount -o loop,offset=32256 centos6.img /mnt/centos6. But it shows this error: you must specify filesystem type. As I have more ...
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2answers
2k views

Installing Freebsd as guest OS on kvm without using VNC

I want to run Freebsd as a guest OS on kVM running on Ubuntu server 10.04. All howtos mention VNC as a necessity to start and finish the installation process. Can I install freebsd on kVM without ...
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2answers
1k views

Red Hat Error Class Code: 49 When Attempting To Install Package

I am a Unix noob. I am currently working on a virtual machine that is running Red Hat 4.1.2-41. When I attempt to install a software package, I get the following error: ...
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1answer
740 views

VirtualBox disk performance?

This option was newly added to latest version of VBox , googled a lot , seems no much information was revealed , could anyone please help me pick one disk format ? Which one owns better performance ...
2
votes
1answer
425 views

Will VMX cpu flags increase the speed of virtual machine software , like VirtualBox?

On some CPUs, if I run grep vmx /proc/cpuinfo, I can see a vmx flag under the features entry. Will this feature speed up virtual machine software like VirtualBox?
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1answer
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Ubuntu installed from mini-ISO under VirtualBox doesn't boot

I installed the mini ISO of Ubuntu 11.04 in VirtualBox. After unmounting the ISO image and booting, I can see only black screen for about two hours? Is it normal? What can I do with it in virtual box ...
1
vote
1answer
786 views

Windows 7/Ubuntu 11 dual boot plus VM?

I have installed Ubuntu on my Windows 7 machine, and can now happily dual-boot. What I'd like to do is retain this set-up but be able to use the same Ubuntu set-up as a virtual machine within ...
2
votes
5answers
3k views

How to determine why a machine is running slowly?

I log into a linux server (installed as a virtual machine) using a graphical ssh client (securessh). This server runs a tomcat5.5 server where nexus is installed. When I type commands or delete/copy ...
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2answers
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Are there any virtualization solutions for OpenBSD that aren't from ports?

I'm searching for a virtualization solutions for an OpenBSD host and a CentOS guest. What are my options? I'm searching for one that doesn't use packages from ports. Are there any?
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3answers
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Can libvirt check if virtual machine is fully booted? Can another tool?

I currently have small VM to do certain tests (it has multiple benefits - like testing on another distribution, Fedora 15, as well as running make distcheck without the problem of polluting /). ...
2
votes
4answers
1k views

OpenSolaris vs. Debian for Xen Hypervisor VM server

all. I've just purchased a computer that I'd like to repurpose as a lab server. It's a six-core AMD processor with 8 gigs of ram (16 gig max) and a terabyte hard drive. My idea is to hose Windows, ...
2
votes
2answers
2k views

Can I get full video capabilities in Arch Linux guest on Virtual Box?

I'm trying out arch linux on my win7 host on a VB and I have it installed just fine, the problem is that when I try to use gnome-shell it goes back to fallback mode because it detects that my video ...
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vote
4answers
621 views

Which Distro/Virtual Machine combination is fast and stable?

For numerous good reasons (you know them best ;-) ) I am willing to switch my Notebook's OS from Windows 7 to Linux very soon. However since I am an absolute Linux beginner I am not committed to any ...
4
votes
4answers
342 views

Looking for small distro (to be installed automatically, with g++ and javac)

I'm looking for linux distro only with comand line and i need in it only g++,javac,python. I found Damn Small Linux but it dont have g++ and javac. It should have it out of the box because linux will ...
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votes
1answer
4k views

Slow response time with Gnome shell in Virtualbox fullscreen mode

Today I installed Fedora 15 in a VBox VM to try out Gnome 3. After installing the guest extensions almost everything works fine. Except for the slow response time in fullscreen mode (HOST+F). By that ...
6
votes
1answer
3k views

LXC container network/routing issues

I have been experimenting with LXC virtualisation in order to run virtual machines on a dedicated server, but am having trouble setting up the networking properly. I am using veth bridged networking, ...
2
votes
2answers
6k views

XenServer how can I shrink the virtual drive of XenServer domU?

How can I shrink the virtual drive of XenServer image?. I gave 300Gb of space for one image (domU) and that was mistake. Now I want to shrink it. How can I do that? The system is already set up and ...
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vote
1answer
326 views

KVM guest machine graphics problem

I'm new to KVM. I use the following way to create and start a guest KVM machine. qemu-img create -f raw centos.img 100G /usr/libexec/qemu-kvm -hda ./centos.img -cdrom /usr/local/CentOS_5.6_Final.iso ...
6
votes
1answer
3k views

Xen on openSUSE 11.4

I have done a few installs of openSUSE to use as a Xen dom0 and have not got it working yet. These are the steps I followed: Installed openSUSE 11.4 from Live KDE CD. Installed all updates via ...
7
votes
1answer
4k views

Linux - LXC; deploying images with tiniest possible X11

is it currently possible to setup LXC containers with X11 capabilities? I'm looking forward for the lightest available X11 container (memory-wise), hardware acceleration a plus but not essential. If ...
7
votes
3answers
27k views

CentOS on HyperV - eth0 not in ifconfig?

I've launched a CentOS install in HyperV and assigned a NIC the same way I've done on an Ubuntu VM, however, the device simply isn't picked up. Only my loopback is found by ifconfig. How should I go ...
5
votes
1answer
5k views

What are some alternatives to virtualbox

I have a lot of trouble lately installing on a box that i can't reboot or change the kernel. Is there any other package that supports gre tunnels (if the os supports ) that i can run on linux? ...
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votes
3answers
267 views

Running Linux virtual machine guest on Linux Host

I have a machine running Debian Linux (stable), but I'd also like a Debian unstable box to use as a sandbox to test and develop. Is there an easy way to create a virtualized Debian unstable machine on ...
2
votes
2answers
1k views

Virtualization solutions under OpenBSD

I use "OpenBSD as my Desktop OS". What are my choices to run a Linux Distribution, or a Windows (XP/7) in a Virtual Machine? I know that the following apps are not available for OBSD: VirtualBox ...
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vote
2answers
403 views

Multiple dom0's on a single Xen host?

I've recently been researching Xen, and this has come up as a quistion for me. Is it possible to have more than 1 dom0 running on a single Xen host? The reason I ask is that this is very similar ...
2
votes
1answer
466 views

Coreboot + QEMU Tutorial Request (Google has failed)

Can anyone point me in the direction of an end-to-end idiot-proof coreboot+qemu tutorial? I'm having trouble understanding how qemu is set up to emulate different hardware (also having trouble ...
4
votes
1answer
912 views

AES-NI not passed to guest in Virtualbox

I'm trying to use encryption inside a virtual machine. The problem is that the AES-NI doesn't seem to be passed to the guest virtual machine. I have Vt-x enabled. This is my host cpuinfo: processor ...