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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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
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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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0answers
30 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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3answers
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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); ...
2
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1answer
322 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 { ...
33
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9answers
59k views

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 ...
7
votes
3answers
9k 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
7k 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
votes
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 ...
4
votes
1answer
5k 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, ...
2
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0answers
146 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 ...
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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: ...
2
votes
1answer
386 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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vote
1answer
1k views

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
757 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
2k 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 ...
5
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3answers
586 views

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
1k 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
563 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
316 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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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 ...
5
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, ...
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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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1answer
273 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 ...
6
votes
1answer
3k 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
2answers
23k 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
4k 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? ...
2
votes
3answers
262 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 ...
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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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2answers
377 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
419 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
808 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 ...
11
votes
1answer
4k views

Using a LVM partition as a Virtualbox drive

Is it possible to use a LVM partition as a Virtualbox disk? I can't find any option to use a device as a Virtualbox disk, only disk images.
2
votes
2answers
1k views

Using mplayer inside kvm/qemu

Is it possible to use mplayer inside kvm/qemu configuration? What video driver should I use? The only driver that worked was sdl and it was super slow. EDIT: I just found out that VirtualBox works ...
3
votes
3answers
2k views

How secure is Ubuntu in Virtualbox on Windows host?

I have the most recent version of Ubuntu in Virtualbox on Windows 7 host. How secure will that be? I mean if I get malware on windows how will that affect the Ubuntu system I am working on?
2
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0answers
332 views

Virtual machine hangs when trying to login after beeing idle for som time

I'm using Microsoft Virtual PC 2007 to run a linux virtual machine, but after some time I can't login to it -- not from the instance on the localmachine or ssh in to the machine. Both give the same ...
2
votes
1answer
3k views

qemu no boot device found!

I am trying to set up a Linux x86_64 virtual machine on a 32bit Linux computer and I've been told aqemu's Wizard is a good option. I can follow the wizard steps, but when I try to start the virtual ...
8
votes
2answers
3k views

How can I install a 64bit Linux virtual machine on a 32bit Linux?

I've got a computer (Intel core i5) with 32bit Linux installed (ubuntu 11.04) and I would like to install a 64bit Linux virtual machine on it so I can test 64bit command-line applications on it.
5
votes
2answers
381 views

Choosing virtual machine software on Linux

There are many virtual machine software out there. Even some are included into mainline Linux. What differentiates them, and what criteria should one ponder while choosing one?
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1answer
4k views

What is Dom0 and how can one use it?

I have heard that Xen is now fully included into mainline Linux, and is usable via Dom0. Bare with me: I'm no expert on virtualization, let alone virtualization on Linux. What is Dom0, what is its ...
2
votes
1answer
770 views

How to create a “jailed” environment for an application under Linux?

Using Ubuntu 11.04 as a Desktop OS, I want to reach "bigger security" with a "jailing" processes: VirtualBox, Google Chrome, Firefox, VLC, PDF/djvu reader, MP3 player, wine, pidgin, transmission, ...
6
votes
6answers
4k views

Install virtual machine as non-root?

Is it possible to install any virtual machine software as non-root user and run it ? Which VM's are possible to be installed with out need of root access ? If it is not possible what would be the ...
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votes
2answers
1k views

Virtualbox, mounting guest directory on host computer

Is there a way to mount a directory residing on my VB guest (linux) on my host (linux)? I know I can do it the other way around with the shared folders feature on Virtualbox, but is there a way to do ...
29
votes
2answers
22k views

How do I run 32-bit programs on a 64-bit Debian/Ubuntu?

I have a 64-bit (amd64 a.k.a. x86_64) Debian or Ubuntu installation. I need to run 32-bit (i386/i686) programs occasionally, or to compile programs for a 32-bit system. How can I do this with a ...
4
votes
2answers
205 views

Strange encoding in Slackware

I am a student and learning about operating systems, I was modifying a file using vi, when I accidentally did something (I don't remember what) that change the codification/encoding and now this is ...
4
votes
1answer
1k views

Reading a filesystem from a whole disk image

I ran these commands: VBoxManage clonehd d6b9f0a5-98df-48ca-83c8-91a0809ec349 --format RAW Debian.raw sudo dd if=~/.VirtualBox/HardDisks/Debian.raw of=/dev/sda5 When I try to mount the partition, I ...
5
votes
2answers
735 views

Xen/KVM/LXC for testing packages

On Debian Stable, I would like to be able to create a new instance of the OS, use apt-get to install some Unstable packages with dependencies, then cleanly delete the whole thing when I'm done. ...