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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Oracle's VirtualBox and keyloggers

So, I have installed Windows 7 in Oracle's VirtualBox (5.0.8) and I would like to know if the Windows 7 software (including viruses and malware) is able in the default VirtualBox settings access the ...
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12 views

Golden image updates in qemu

Consider that there are 100 windows virtual machines coming from a single base image and each vm is added to domain along with minor other machine specific settings which can be done by a script. ...
2
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43 views

Virtualization (KVM) and excessive cached RAM

I've set up a virtual machine through KVM-libvirt (virt-manager) with Windows 10 on it and I'm getting an odd behavior on the host side. I'm running a 64bit Arch host with 24GB of RAM, 12 of which are ...
2
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1answer
159 views

Unable to use VMWare Workstation 12

I found myself unable to use the VMWare Workstation 12 trial on Debian Stretch as well as on Ubuntu 15.10. It installs just fine, but when I attempt to start it, it simply does nothing, no error or ...
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1answer
30 views

Port forwarding error

I am trying to use VNC on my KVM guest, following this guide: http://blog.scottlowe.org/2013/08/21/accessing-vnc-consoles-of-kvm-guests-via-ssh/ This is the ssh command I am using from my host: ...
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1answer
80 views

Virtfs (Plan 9) vs NFS as tool for share folder for virtual machine

I have QEMU virtual machine. Linux host and linux guest. I want stable and fast solution with minimal performance cost. I'm considering two technologies for shared folders (between guest and host): ...
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12 views

Where to find information about tests from Phoronix test suite?

Phoronix Test Suite is a linux benchmarking tool made of tests and suites of tests. To print all available test phoronix-test-suite list-available-tests To print all available suites ...
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39 views

USB Redirection with libvirt/virt-manager stopped working after upgrade f21->f22

I performed an upgrade from fedora 21 to fedora 22 today. I used FedUp and followed the instructions at https://fedoraproject.org/wiki/FedUp Afterwards I installed fedy and activated some tweaks ...
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18 views

expand a Hard Disk of a Virtual Machine centos

my Centos VM was 10 G and I want to expand it to 20G I found a lot of links give a steps to achieve that goal But all of them depending of make physical volume and Logical volume based on ...
0
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2answers
106 views

Should I install Kali to a partition or run it virtually?

I am interested in taking a course on penetration testing with Kali Linux. Should I install Kali to a partition on my computer or on VirtualBox? Which one is better in general for pentesting?
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1answer
83 views

HP EliteBook 8530p wifi problem (hard blocked) in Qubes OS

I just installed Qubes OS on an old HP EliteBook 8530p and cannot connect to the internet with wireless. This laptop has a physical wireless switch that must be toggled 'on' for the wireless to ...
3
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3answers
259 views

how do I build a bridge between two virtual machines?

I have used virt-install to create two CentOS 7 virtual machine guests on a CentOS 7 host computer. One virtual machine is called webvm, and hosts web sites on a private network. The other virtual ...
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23 views

Is the running Xen Suse OS just Dom0?

When I select "Xen" option during Suse boot which has installed "Xen" tools: Is the running OS just Dom0?
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134 views

How do I ssh into a new virtual machine?

note by derobert: problem was resolved in chat, starting around http://chat.stackexchange.com/transcript/message/24666451#24666451 if someone wants to write up an answer. Turns out the bridge wasn't ...
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0answers
210 views

Virtualbox and GPU Pass-trough: Device with host PCI address already attached to this VM

I have server with several GPUs. My idea is to attach them to different VMs in order to use that VMs in CUDA (or OpenCL) calculations. My setup: CPU: Intel Xeon E5-2670 GPUs: 1 x Radeon HD 7970 ...
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1answer
53 views

Running a Linux distro on a VM on a USB drive

I apologize if this isn't quite the right place to pose this question, but I couldn't find a more appropriate stackexchange site to ask this question. My goal is to have my USB drive loaded with a ...
2
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1answer
90 views

how do I create an appropriate drive for a libvirt virtual machine?

I am trying to use virt-install to create a CentOS 7 virtual machine in a CentOS 7 host. Towards that end, I have been reading the virt-install documentation at the RHEL web site, and I have also ...
0
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1answer
212 views

How to use Vagrant provisioning to install a package without download?

The title says it all. I'm using Vagrant boxes for several purposes, and in most cases the prepared boxes I can download are totally sufficient. However, sometimes I need one or a few additional ...
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22 views

how do I virt-install a guest from a dvd?

On a CentOS 7 host server, I would like to create a guest virtual machine with CentOS 7 as the guest operating system. I have a CentOS 7 installation DVD that was burned from an iso file in windows, ...
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2answers
271 views

Unable to connect to Linux VM from Windows 7 Desktop

ssh destination: --VM : Oracle VM Virtual Box 4.3.20 --Linux installed on VM: Fedora 22 (IP: 10.0.2.15 ) ssh source: --Windows 7 Desktop I installed putty on Windows 7 Desktop and am trying ...
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2answers
377 views

yum No package VirtualBox-5.0 available. on a MINIMAL installation of CentOS 7?

I have tried many tutorials that give explicit steps for installing VirtualBox on CentOS 7, but none of them go to completion without throwing errors. Some of the tutorials assume that you will ...
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1answer
685 views

service vboxdrv setup throwing error when installing VirtualBox on CentOS 7

I am trying to install VirtualBox 5.0 on a minimal (terminal only) CentOS 7 server, but I keep getting the following error when I type service vboxdrv setup: The service command supports only basic ...
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1answer
21 views

How should I test installation procedure on clean system (quickly and disk-space cheap)?

I was asked to invent an installation procedure for existing application, including compilation, downloading and installing the server and some other things. I have managed to get the program to work ...
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2answers
1k views

Is developing/testing a linux module safe using a virtual machine?

I'm in an operating systems class. Coming up, we have to do some work modifying kernel code. We have been advised not to use personal machines to test (I suppose this means install it) as we could ...
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1answer
70 views

Why isn't VBoxManage booting from DVD?

I am trying to use VBoxManage to create and manage CentOS 7 virtual machines on a CentOS 7 server. The commands below first result in the following conflicting statements: 1.) that the virtual ...
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1answer
42 views

Thoughts on security in linux [closed]

So ransomware is around again - at least in Denmark. This is a major issue for MS-Windows users, but does almost never affect Linux or Mac. The reason is an issue of debate. But since the consumer ...
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81 views

How to view all users and change the password

What I have done is set up a virtual machine using AQEMU/KVM of Kali Linux, the problem is that I don't remember either of my log in details user name / password. So, is there a way to view those ...
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22 views

Error installing Zoiper in CentOS virtual machine

I'm trying to install zoiper on my CentOS virtual machine but when I finish installing it, this pops up and zoiper terminates:
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2answers
46 views

Allow multiple local servers to share a local domain

I'm wanting to set up multiple local servers in VMWare. For example, one web server, one file server, one openvpn server, etc. I would like to create a domain that works locally (e.g. ...
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4answers
517 views

Number of CPU cores versus frequency of cores in Qemu/Virtualbox

I plan to build a workstation mainly for running virtual machines. There will be dozens of virtual machines and they do not execute computationally expensive tasks. I will use mainly Qemu(with KVM ...
2
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1answer
102 views

How to connect from one VM Guest instance to another to another VM Guest instance

I have Windows 7 as my Host OS and I have a VM guest instance of CentOs 6, now I have created a more Instance guest Centos 6 via Vagrant. All are working fine and I am able to do a ssh/ping from ...
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90 views

How to run Windows with GPU virtualization?

A year ago I switched to Ubuntu for my primary OS, which has worked out just fine. Every now and then I want to play computer games and while using Wine often works, I can't get all of the games that ...
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29 views

switch tty in Gnome Boxes

I have installed Fedora in Gnome Boxes but I don't know how to switch to tty. Second problem is I cannot input password in login prompt. Please help
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21 views

Separation between the User machine and Server machine by another linux for monitoring

I am planning to have three virtual machines with virtual box (m1, m2,m3). I already installed on m1 = Windows XP Home Edition, and on m2 = LUbuntu 15. The big picture is this : m1 : a user m2 : ...
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377 views

mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is disabled

I'm using UBUNTU 14.04 as virtual machine on Windows using VMWARE , after logging I installed nmap but after trying to run nmap -sP 10.42.0.0 I get the following message mass_dns: warning: ...
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2answers
193 views

Failed to load VMMR0.r0 (VERR_VMM_BUT_AC_CLEAR)

I get this error on my mac when I'm trying to boot up any virtual machine on virtual box on my new MacOS X Yosemite Failed to load VMMR0.r0 (VERR_VMM_BUT_AC_CLEAR) Result Code: ...
0
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1answer
108 views

Setting up MEAN webserver in Ubuntu 14.04 vm

I'm new to the world of web servers. My lab gave me a url with a Ubuntu 14.04 virtual machine. I sorted out enough of what I needed to do to SSH in, install all relevant libraries, and clone my code ...
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93 views

How to differentiate 2 NICs with the same PCI address

I am running Fedora 22, and have a GPU that I passthrough to a KVM guest. I accomplished this by adding pci-stub.ids=<pci id 2>,<pci id 2> to my Grub boot option. The two PCI IDs I'm using ...
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24 views

Add new HDD to Azure VM and set RAID 0

I need to attach some hard drives to my Ubuntu Azure VM and enable RAID 0 for them to improve the performance. The new storage space will be under /home/director (for storing my host data). I have ...
0
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1answer
62 views

why does my Ubuntu Virtual Machine slow down after a number of searches, and builds?

I recently learned that my Ubuntu Linux file system may cache the result of some commands such as searches, sorts, and perhaps build commands such as make. I run Ubuntu in a VM, and although I have ...
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161 views

QEMU doesn't boot iso file in UEFI

The Problem I would like to run a Windows 8.1 iso inside QEMU KVM. For this I have downloaded the necessary OVMF files (from here). I can successfully boot a Windows 10 in UEFI mode, but with the ...
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1answer
385 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 ...
2
votes
1answer
72 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 ...
0
votes
1answer
62 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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0answers
190 views

where to compress=lzo, btrfs with virtual disk images, with their vm's internally using btrfs

I've been using compress=lzo on my btrfs volumes, because I read this fast compression method actually increases drive performance. (Haven't tested myself.) I'm starting to use ...
2
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1answer
93 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
99 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
305 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 ...
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2k 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
142 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 ...