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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750 views

Can't boot properly after moving all files off then back on my VM drive

I have created an Ubuntu 12.04 32-bit VM in VirtualBox with a .vdi disk. I then mount this disk with qemu-nbd and move all the files off it; then back onto it. When I boot the VM again I get varying ...
3
votes
1answer
2k views

Measuring CPU %steal on VMware and Hyper-V hypervisors

For Xen Linux guests, %steal time is readily available via top and other utilities. Is it possible to get this and related metrics from within a Linux guest when running a non-Xen hypervisor such as ...
3
votes
2answers
7k views

How to Add Extra Disks on KVM based VM

I installed Redhat 6.4 on KVM Server. Right Now there is only One Disk /dev/vda. Now I need to add extra Disk like /dev/vdb I tried adding New Volume but it is not showing when I do fdisk -l How to ...
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votes
2answers
195 views

Partclone error

I am trying to clone a disk in a VMware Machine The initial situation is: When cloning, I get the following error: Notes: The VM is bootstrapped with the Arch Linux ISO. sda is a physical ...
3
votes
4answers
644 views

How can I zero files out inside a VMware image file so that their space can be reclaimed?

is there a command on Linux to remove a file but zeroing it's contents first? so if i do, something like this: rm -rf /var/cache/pacman/pkg/* it would overwrite each file on that directory with 0 ...
4
votes
2answers
3k views

How to force the time and date settings to refresh from the internet?

I'm running Ubuntu 12.04 LTS under vmWare. When I restart a suspended image, the system clock doesn't detect that the system time is out of date. In the Time and Date settings dialog, I've selected ...
3
votes
2answers
6k views

How to check which hypervisor is used from my VM? [duplicate]

So I'm running a VM somewhere and want to know what hypervisor the host is running. Any way to check whether it's running KVM or in a container? The vm is running Ubuntu
0
votes
1answer
275 views

centos 6.4 trouble with /dev/pts/ptmx

I have a problem with the server running on CentOS. CentOS has been upgraded to version 6.4 and has all updates. Updates were made according to the official repositories. On the server running the ...
5
votes
1answer
2k views

Can virtfs/9p be used as root file system?

Is it possible to use a folder shared from the host to the guest via virtfs/9p as the root file system inside the guest? Loosely related to my previous question: Can virtfs/9p be used to share the ...
2
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1answer
633 views

Can virtfs/9p be used to share the same host folder with multiple guests?

So far I have resorted to sharing host folders with the KVM guests via Samba. Now, reading up a bit on it, it appears that "VirtFS (Plan 9 folder sharing over Virtio - I/O virtualization framework)" ...
2
votes
1answer
175 views

PowerVM lpar specific cpu/mem info

I want to get the CPU and memory allocation information from lpars of PowerVM through HMC. I have used lshwres -r proc -m <ms> --level lpar lssyscfg -r proc -m <ms> The fields of ...
2
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0answers
2k views

In virtual machine manager, is there a way to add disk space to an existing disk?

I know that in virt-manager you can add RAM and processors to the virtual machine, but is there a way to increase the available disk space larger through the GUI? Edit: @slm was able to find the ...
53
votes
11answers
34k views

Easy way to determine virtualization technology

I have command line access to a Linux machine which may or may not be virtualized. I want to determine what kind of virtualization technology it runs on, if any (VMWare, VirtualBox, KVM, OpenVZ, Xen, ...
2
votes
3answers
4k views

Boot my kernel in a Virtual Machine?

I'm learning now how to compile and boot linux kernels. Is there a way to boot kernels in a virtual machine, rather than messing my system? I use VMWare Workstation on Windows 8. Can I use that to ...
2
votes
2answers
298 views

KVM loss of data?

I'm planning to install KVM on Linux Mint. I heard it is possible to corrupt files and partitions. There are warnings here but I haven't finish reading it (I will tonight). There is also another ...
5
votes
1answer
3k views

Can't do chown/chgrp/chmod on shared dir in VirtualBox Ubuntu 10.04

I installed Guest Additions on my Ubuntu 10.04 VM running out of VirtualBox in order to enable directory sharing, following these instructions. Set the shared folder in the VirtualBox GUI and it ...
6
votes
1answer
2k views

Can VirtualBox return IP address for launched VM?

I would like to start my VM from the command line and without the GUI using the following command: VBoxManage startvm <MY_VM> --type headless and the SSH into it from the next prompt. The ...
7
votes
2answers
3k views

Is there a convenient small Unix virtual machine I can install as an Android app?

Ubuntu for Android seems to be missing in action. I'm travelling tomorrow and I need to take a basic Linux machine with me. I'd rather just take my tablet than a laptop. So is there a reasonable ...
1
vote
2answers
3k views

Physical host or VM [duplicate]

Is there a way to tell whether a host is a physical one or a VM and which virtual container it is running out of (e.g. VirtualBox or VMWare)? I was wondering if that info may be in /etc some place.
1
vote
3answers
129 views

Virtualizing a Low End Virtual Server

I have started to teach the lesser fortunate children in my area about technology and computers in general. Some of them show some real promise and I'm planning to introduce them to Linux and Open ...
2
votes
1answer
3k views

Guest addition already installed in Linux mint

I have recently installed Linux Mint 14 on a VirtualBox VM and it seems that guest additions are already installed. I did not install them. How is this possible? Does Linux Mint know that it is ...
1
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0answers
155 views

benchmarking ftp in 3 methods of virtualization

My Bachelor Final Project is about benchmarking visualization methods with ftp, web and mysql services: installing Debian on xen (para-visualization) kvm and lxc with equal resources config (equal ...
2
votes
2answers
900 views

Solaris11: Alternative to xVM Hypervisor?

AFAIK, support for the xVM Hypervisor - basically Xen - has been dropped in Solaris 11. Is there an alternative/replacement for it? How does it compare to Xen? Obviously there is zones if you want ...
2
votes
0answers
64 views

Can I use Synaptics' output in KVM?

I have been looking at MenuetOS, a simple graphical OS written entirely in FASM. The only reason I don't actually use it is that its touchpad support is pure garbage: every time I try to run MenuetOS, ...
6
votes
2answers
114 views

How to set up interchangeable VM guest/hosts

I'm looking for a way to set up a computer so that the disk is partitioned for multi-booting to two operating systems: Linux and Windows. Whichever one is booted, I want the other to be accessible as ...
2
votes
3answers
1k views

How can I get kqemu or even just qemu to show up in virsh capabilities on CentOS 6.4?

I have a CentOS 6.4 box that I'm trying to set up a VM on to run WinXP. This box doesn't have VT, which may not be ideal, but I'll settle for less than ideal. Apparently I should be able to install ...
1
vote
1answer
730 views

virt-install error: install methods 'cannot be specified for container guests'

I was following the Dell RHEL VM guide but working on CentOS 6.4 i386/686, and got to the virt-install step. After correcting a typo, I went back and deleted the vm.xml file it was suggested I ...
2
votes
1answer
2k views

virt-install complains “error: no such option: --network-bridge:br0”

I was following the directions here to set up a VM in CentOS 6.4 i386/686. But I'm getting this error: $ sudo virt-install --network-bridge:br0 --name vm1 --ram=1024 --vcpus=1 --disk ...
2
votes
1answer
2k views

Installing KVM on CentOS 6.4 without GUI (yet)

I've installed CentOS 6.4 from the 'minimal' iso, so it doesn't come with a GUI. Will this question's answer allow me to install KVM, or do I need to install KDE or X-server or something first?
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votes
2answers
3k views

Where do I find versions of Turnkey Linux made to run on 32-bit VirtualBox?

What I found on the main site turnkeylinux.org/core is the file turnkey-core-12.1-squeeze-amd64-vmdk.zip which I suppose is for 64-bit OSes (corrections accepted..).
2
votes
1answer
6k views

sendmail through virtual machine

I am successfully performing some very basic SMTP sending in my machine with a basic Python script: .... things ... try: smtpObj = smtplib.SMTP('localhost') smtpObj.sendmail(sender, recievers, ...
1
vote
1answer
524 views

Virtualbox: Find Windows host DNS name on Debian guest

I have a Debian Squeeze guest system running on a Windows 7 Professional host, a notebook computer. As a web developer, I need to mount my Windows project root folder into the Debian system. ...
0
votes
2answers
3k views

CentOS VPS - Pointing my Domain name to the VPS static IP

I am a Linux Newbie. I have a VPS with CentOS installed at my ISP and I am managing it remotely. Up to this point, I have had shared webhosting on a Linux machine at my ISP where I had CPANEL ...
1
vote
1answer
93 views

Non-persistent differencing file

I have a large file (5-10 GB) and want to access this file in a special file system with the following conditions/features: There is a single process that reads and write on the file. When the ...
6
votes
1answer
718 views

Convert Debian Live USB persistent filesystem to a standalone installation

How would I convert a persistent filesystem (live-rw) from a Debian Live USB to a standalone, bootable installation that can be run on a VM? What I've tried Chrooting and installing a bootloader ...
5
votes
1answer
2k views

Emulate unplugging a network cable with qemu-kvm

[Background: I'd like to actually test How to take down a static network interface when not connected? ] I'm setting up a QEMU-KVM virtual machine using libvirt (via virt-manager). I put two NICs on ...
0
votes
1answer
56 views

Is there any way to deploy an virtual machine software via command line on centos3

I have a centos3 based legacy distribution with all the desktop environment removed. I have only access via command line. I am now asked to run a centos 6.1 distribution on a virtual machine on this ...
1
vote
2answers
4k views

cannot create symbolic link on CentOS 5.6 - File exists error

I am trying to setup a symbolic link on my CentOS 5.6 machine to point dev_crmpicco/ to ~/vhosts/dev/dev_crmpicco/web/ I am using the following command: [crmpicco@devel dev]$ ln -s ...
1
vote
0answers
218 views

omap3530/3630 emulation on QEMU for overo and beagle machines

On QEMU's source code for beagle and overo I can see that the cpu emulated is the OMAP3430. I will like to know if it's a way to make QEMU emulate OMAP3530/3630 cpu's for those machines? On bealge : ...
1
vote
1answer
2k views

Need to configure network card manually after each reboot

I am using SUSE Linux Enterprise Server 11 (x86_64) as VM Ware virtual machine (that was cloned). Not sure why but network card cannot be configured via yast2. If I go to edit and hit enter Yast will ...
1
vote
2answers
2k views

Linux-distro with built-in Xen?

Are there any Linux-distros with Xen "built-in" and ready to act as host for virtual-computer out-of-the-box? Alternatively, distros where you can easily select "Xen-host" as an install option? I'm ...
1
vote
0answers
257 views

How to do incremental backup of .img files containing windows partition?

On an OVS I have a few windows machines. I want to create a full backup their .img disk files, thats done, .img.gz. Than I want to incrementally backup their C:/ partition, but thats not working. ...
3
votes
2answers
1k views

ttyO ports do not have the good port address on QEMU 1.4.0 running image for beagleboard-xm

I'm running an Linux Image (kernel 3.2.8) for beagleboard-xm on QEMU's 1.4.0 emulator Ubuntu distribution for 13.04. My image is created using Buildroot beagle_defconfig. I added some pkgs to be able ...
0
votes
0answers
110 views

How to start a GUI program in a VM with PHP

I have an Ubuntu 12.04 VM running on my online server where there is no display attached. I want to start Teamviewer there on that VM to get graphical access to that server. I guess I have to give ...
11
votes
1answer
8k views

ssh-agent forwarding for a Vagrant VM

I'm currently looking at setting up a Vagrant environment on my Mac machine, so that I can run vagrant up and it will then install rbenv and ruby and all I need. Then I have a Bash script that will ...
3
votes
2answers
444 views

Terminal-based (non GUI) virtual-computer program?

Are there any terminal-based (ie. non-GUI) virtual-computer programs out there? I've been using programs like VirtualBox and QEMU, but they're obviously GUI-based... I was hoping for a virtual PC ...
1
vote
1answer
497 views

Upgrading Debian Squeeze to Wheezy - Should updatedb.conf be kept or replaced?

A similar question to Upgrading Debian Squeeze To Wheezy - Should conf' files be kept or replaced?, but in my case it concerns a different conf file and I am not on Linode. I am upgrading a VMWare ...
0
votes
3answers
1k views

NFS server on qemu guest

I need to know how I can mount block devices, placed on a qemu guest system, from host. So in this case we have NFS server placed on guest system and NFS client on the host's side. There are a lot ...
7
votes
2answers
5k views

CPU usage of KVM

I have a linux host with 4 KVM linux guests. All the guest are pretty much idle, having a load of <0.1 inside the guest. Now, if I do a top on the host, each KVM process is using something about ...
2
votes
2answers
7k views

How to enable Virtualization AMD-V Aspire one AO725 from BIOS or otherwise

I'm try to use the virtualbox to visualizer the system of 64bits but the error that get is: La aceleración VT-x/AMD-V ha sido habilitada, pero no es funcional. Su sistema invitado de 64-bit fallára ...