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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878 views

Start a kvm virtual machine fullscreen on boot

How can I start a Windows virtual machine in kvm on boot in fullscreen mode, in a way that the fact that Windows is running virtualized is completely hidden from the windows user ? Basically after ...
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1answer
93 views

Iptables rule to drop packets to and from local network

I want to set a virtual machine on laptop, but I don't trust the guest system fully, so I would like to block it's access to local network (to network 192.168.0.1/16 or 10.0.0.1/8 or ... the other one ...
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1answer
82 views

ssh over unix pipe or pty device [closed]

Ok, I don't even know how to put this into words. I have a /dev/myDevice which automatically connects to some ssh server when opened. How do I connect to it with ssh? Is this even sane? If it's insane ...
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1answer
187 views

Time is not synchronized in Linux VM

I am using one Linux VM through VNC viewer from my Windows machine. What I am seeing is that time between two is not synchronized. It seems that the VM is about 5 minutes delayed from Windows (windows ...
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1answer
152 views

Create new physical volume using lvm

I have Linux Mint 17.2 codename Rafaela running as a virtual machine with a disk size of 30GB. I used the default LVM installation. I would like now to create a physical volume /dev/drbd0 to use it in ...
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1answer
692 views

virsh and creating storage pools - What is sourcepath “- - - -”

I am running CentOS 7 and was following a chapter in a book dealing with virtualization and creating storage pools. I successfully ran the following command, but I'm not sure what setting - - - - as ...
25
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2answers
5k views

What do the processes inside a Docker container look like?

I've heard confusion come up several times recently around what a Docker container is, and more specifically what's going on inside, with respect to commands & processes that I invoke while inside ...
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1answer
256 views

Is it possible to run a Linux distro within a VM on Qubes OS?

In particular, I am considering running a minimal distro (maybe ttylinux) within Qubes. I understand that Qubes can run each OS component and application within a separate VM but how about an entire ...
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2answers
177 views

Is it possible to install Xen on a computer (processor supports virtualization) alongside Ubuntu and Windows?

The computer currently triple boots Ubuntu and a couple of Windows versions. Now I want to add Xen into the mix. Would it work if I simply made a new partition for Xen, or does it need to take over ...
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1answer
226 views

Check if Ubuntu is being installed in VirtualBox VM

I am trying to automate the installation of Ubuntu from a network repository. I am now successfully able to configure the ISO image and it does the installation automatically. My requirement: I ...
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1answer
33 views

What things should be kept in mind while assigning static IP addresses to Virtual Machines

I always face problems pinging the base machine whenever I assign statics IPs to VMs. I also don't understand what gateway IP should I give,to connect to the internet or just to be able ping the Base ...
4
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1answer
442 views

Virtual USB HID device

I'm developing an application that will communicate with attached USB HID device. The problem is that there is no real device yet (it is under development by another part of our team), so, I'd really ...
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0answers
249 views

Using raw physical hard disk in virtual machine, with smart capability and true model number seen

Is it possible to add an entire physical hard disk to a VM, and inside the VM see the hard disk for what it truly is? In VMware Workstation 11.1, if I add a hard disk choosing SCSI, with "Use a ...
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1answer
40 views

Laptop doesn' t want to wake up

My laptop (Notebook HP Pavilion g7t-1100 CTO) have been working fine till today, I enabled Virtual Technology in BIOS and from that time laptop doesn't want to wake up after I slept it. When I disable ...
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0answers
104 views

Gnome-boxes not able to see virtual machines after sleep

I am having a bit of trouble to solve this issue. I am using gnome-boxes to run my windows boxes for my school project purpose. When I boot the system, everything works just fine When I type : ...
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2answers
539 views

Send network traffic via a Windows VM on the same host to use corporate vpn?

At work we have a VPN solution that will only work on windows. I personally do not run Windows at home and run Linux (Ubuntu 14.04). I used Virtual Box to setup a Windows 7 virtual machine to run ...
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0answers
271 views

how do I mount an external hard drive connected via SATA Wire to CentOS 7

I have CentOS 7 installed as a guest OS inside VirtualBox running on a Windows 8.1 machine. There is a SATA Wire connecting the machine to an external hard drive that used to contain a dual boot ...
0
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1answer
900 views

enabling vnc after using virt-install

I've created a virtual machine using virt-install with graphics --none. I want to enable vnc. I've tried virsh -c qemu:///system qemu-monitor-command vm171-SC-1 --hmp change vnc :3 but it doesn't ...
0
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1answer
41 views

Disk mount on a linux VM , mounted elsewhere

Hi I am using a slightly unnecessary(maybe?) kind of a set up ... A debian build_VM The build_VM ran out of space so I formatted and mounted a disk on to the build_VM But before mounting the ...
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1answer
2k views

VirtualBox guest cannot connect to USB drive, why not?

I have VirtualBox installed in Windows 8.1 and I am using it to launch and use CentOS 7 within VirtualBox. When I connect a USB drive to the computer, and right click over the icon circled in the ...
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1answer
128 views

Setup a classroom Linux system

I need to set up a 30-user Ubuntu classroom. All our PCs are currently Microsoft Windows based and run from Windows servers. In the school I need my students to have full access to Ubuntu OS, so that ...
2
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1answer
292 views

What are the differences between virtualbox-linux and installed-linux? [closed]

Is using virtualbox for running linux any different than installing linux on the machine except for performance ? Are there any drawbacks from using virtual box to run linux than trying the real thing ...
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0answers
59 views

Export virtualbox image files from a linux box

We have a Linux box that we used to have support for. but the company that supports the box went out of business. The server (I believe is Ubuntu) was backing up our physical servers and creates an ...
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1answer
145 views

Why does this bash fork bomb not work on my RHEL VM?

I'm running a RHEL 6.5 VM in a VMware ESXi environment and accessing it through the vSphere Web Client virtual console (in my browser). I wanted to crash this machine on purpose and executed :(){ :|...
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2answers
294 views

How to configure a workstation for multiple Linux and Windows users?

I work at a university and a part of my job entails usage of software for numerical simulation of fluid flow. My department decided to buy a new high- end workstation that should primarily serve as '...
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1answer
1k views

How to send/upload a file from Host OS to guest OS in KVM?(not folder sharing)

I have to make a configuration file available to guest OS running on top of KVM hyper-visor. I have already read about folder sharing options between host and guest in KVM with 'qemu' and 9P virtio ...
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3answers
8k views

Installing VBox Guest Additions when there is no X-server

I'm using Virtual Box on my windows 8.1 host machine. I have installed CentOS & Ubuntu in 'Graphical Mode' and had sufficient practice. But now I wanted to switch to 'Command Line Mode" completely....
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1answer
120 views

Enable virtualization with gigabyte ud3 990fx

I'm trying to get the virtualization running : I have the following settings: Mainboard: gigabyte ud3 990fx CPU: fx-9590 Kernel: 3.11.0-12-generic Linux Mint 17 In the bios both svm as well as ...
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1answer
179 views

LinuxMint “File System” shows no space when many GB exist

I have a VM running LinuxMint 17.1. I just resized the virtual disk, then used a live CD to resize the system partitions. I now have 18GB+ free. However, when I look in Files, "File System" shows as ...
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1answer
3k views

GParted LiveCD fails to start

I have a VM setup in VirtualBox (LinuxMint 17.1). But I'm trying to boot to GParted so I can resize a partition. I'm using gparted-live-0.22.0-2-amd64.iso and it boots correctly. I've tried every ...
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0answers
105 views

Moving a whole server into docker instance (or LXC)

It seems to work, to move an existing install into a virtual machine. Is it possible to move a whole Debian server into a docker instance inside the same machine? I would like to get a docker that I ...
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0answers
98 views

extract information about vmware host from within the guest

I have virtual machine (guest) running inside VMware Hypervisor (host). The guest is running Debian and has vmware tools installed How can I extract as much information as possible about the host, ...
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1answer
2k views

How to mount VMware-tools cdrom inside a VM

I know this should be easy, but I'm having a hell of a time figuring out where the vmware tools cdrom is (for instance it's not /dev/cdrom) and so I can't figure out how to mount it. I'm on Kali Linux,...
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1answer
246 views

USB not working : USB Ports Hijacked/Reserved Permanently by VirtualBox

This scary incident happened today morning. I started a virtual machine inside my Linux Mint host and shared my USB Wireless device with the machine. The virtual machine's image resided in an ...
1
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1answer
105 views

How do I keep the time on a server (virtual machine) updated over time?

I have a virtual machine running headless in my machine. When I start it for the first time, the result of date command is correct. But after about a day or 2, I SSH into it and the date command has ...
0
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1answer
90 views

Why does user mode linux spawn 4 processes?

If I start User Mode Linux with this command: ./kernel32-3.19.8 ubda=./Debian-Wheezy-x86-root_fs mem=128m On Debian GNU/Linux 8 (jessie) with one CPU core, why do I see 4 processes in top: 1608 ...
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2answers
9k views

Linux-KVM, QEMU, Virtualbox, VMWare [closed]

I'm new to Linux. I'm trying to build Chromium OS and run it on QEMU. Meanwhile I came across Linux KVM, Virtualbox and VMWare. So I have basically two questions about virtualization in Linux: What ...
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1answer
76 views

VM Machine rebooted, cant find how?

One of my VM machine was rebooted yesterday, but cant find how & who did it. In the log I can only find "receiving signal 15, terminated" please help how to do further troubleshooting.
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1answer
6k views

How to start Virtual Box service on Linux

I performed a dist-upgrade and then and autoclean and autoremove. It disabled the Virtual Box service on Linux because the headers were out of date. The headers caught up, so I rebuilt the modules off ...
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1answer
57 views

virtualbox on os x lags when not active

I am running ubuntu server as guest inside virtualbox on os x 10.10.x host While the system works, it lags whenever the virtualbox window is not the active app. E.g. I log into ubuntu from terminal ...
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3answers
251 views

How to recognize which virtual environment is being used [duplicate]

Suppose I have logged in through sshto a given Linux machine, knowing nothing about it. How can I quickly check what virtual environment (VMWare, VirtualBox, LXC, etc., if any) is currently running ...
0
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1answer
286 views

Running windows programs on linux via VM or PlayOnLinux?

I have Linux Mint 17.1 Cinnamon edition installed and, till now, I used PlayOnLinux to run a windows program in Linux. Browsing on the internet, I noted it is really simple to run a program by using ...
2
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1answer
424 views

Modifying files inside a snapshot (qemu img file)

I have taken a snapshot recently to assist me build VMs quickly with the operating system I desire (through virsh), however, every time I build a VM, I would like to modify few files inside the img ...
2
votes
0answers
229 views

Is there a way to emulate a wireless card in qemu / kvm?

Is there a way to emulate a wireless card in qemu / kvm? Or is there no point to this? Is it considered just another interface?
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0answers
434 views

Map a Linux VM's block device to its vmdk file on the vmware datastore

For development and staging purposes, I must frequently create clones of individual virtual harddisks (vmdk container) and move/deploy them into some other system. While I have been able to hack a ...
2
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0answers
203 views

virt-manager error “format=dir: 'dir' invalid format” when creating qemu VM with ISO

This is virt-manager 1.0.1 on Fedora 20. The server has libvirt 1.2.13-1, qemu 2.2.1-2 on Arch Linux. Go to File -> New Virtual Machine. Select Use ISO Image to install from then browse for it. ...
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1answer
1k views

Copy& Paste Fedora and Virtualbox CentOS7

I want copy text from Fedora 21 and paste to Virtual box with CentOS 7 how can I do that?? I change in Virtual box settings Shared Clipboard and Drag'n'Drop to bidirectional Thanks for help, ...
2
votes
1answer
100 views

Mount host directory in a virtual machine

I have a directory on a system which is the host for a virtual machine. I want to make this directory accessible from the guest of the virtual machine. There are some way I can think of, packing the ...
2
votes
2answers
515 views

Add virtual bridge without the loss of networking?

There is a dedicated server without KVM-over-IP support. The server 'owns' two IP addresses, and one of those is used for eth0 at the moment. The user needs to add a virtual bridge, in order to ...
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1answer
478 views

virtualbox can not create new virtual machine

I'm try to make a new virtual machine but virtualbox have this error in end step : Failed to create a new session. Callee RC: NS_ERROR_FACTORY_NOT_REGISTERED (0x80040154) and in terminal this shwn ...