A virtual machine is an emulation of a guest operating system, running on virtualized hardware within a host operating system.

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Maximizing Window for Virtual Machine in VirtualBox

I installed VirtualBox 4.3.28 in Windows 8.1 and am running CentOS 7 within it. But the problem is that VirtualBox is placing a size limit on the frame within which CentOS 7 is visible. Here is a ...
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28 views

Change default network settings for VirtualBox when using NAT

I'm running into an issue where VirtualBox is assigning a guest from 10.0.2/24 when using NAT mode. The problem is its a real network on this site. I see how to change the setting for a particular ...
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133 views

What is the fastest method of transfering files between a Windows 7 PC and virtual server?

I have 600 tiff files of aerial imagery (180MB each) on an external thumb drive. I need to transfer the tiff files from my desktop PC (Windows 7 pro) to a network attached storage (NAS) device ...
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38 views

Windows 8.1 Virtual Machine pointing to CentOS 7

How do I set up a virtual machine within windows 8.1 pointing to a CentOS 7 installation which I would like to install on the same physical box? I have been encountering all sorts of problems ...
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36 views

IOV / SR-IOV / MR-IOV for non-network hardware

I've been looking for real-world examples of this for a long time -- mainly because I'm trying to decide whether to restrict my build-options to using only components (chipsets, processors, ...
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22 views

Accidentally restore a VirtualBox VM to a snapshot

I never made a snapshot of my VM before. Accidentally, I restored it from the current state to the original state (the first snapshot it made automatically). Is there anyway to go back to my LAST ...
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45 views

How make Debian wait for all VirtualBox guests to stop during shutdown/reboot?

I am using the vboxautostart-service to start all my vms on system boot (Debian 7), they've been configured with this command: VBoxManage modifyvm '<vm-name>' --autostart-enabled on ...
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47 views

How to access multiple virtual webservers via one public ip

I'm preparing to configure a remote server, located in some data center. This server will have single public IP assigned. This server will have a hypervisor of some kind (KVM or Xen) installed. ...
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23 views

How can I get my two VM's in virtual box to ping each other?

although each of the adapter are set to "internal network", i keep getting, network is unreachable.. Help Please .. Please make it simple Thanks in advance
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7 views

Hyper-V how to update the contents of virtual machine to physical machine

I have created a virtual machine from a physical machine. My question is if am working on virtual machine then how to update the contents on physical machine. I have created the virtual machine for ...
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14 views

Synology NAS iSCSI + VMware

I don't know much about this "world", but my intent would be to have my VM storage on the NAS so that I could run those VMs in any computer on the network. Is that possible? I know how to create an ...
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141 views

Unable to start ubuntu 15.04 in Virtual box

The installation went smoothly. But after the first reboot, the distro fails to startup. It is all I see in my screen Virtual box version is 4.3.28 r100309 (Latest as of the time of writing) Here ...
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127 views

How to log in on Fedora 22 Cloud image running on VirtualBox

I've just downloaded a Fedora 22 Cloud image and ran it on VirtualBox under Windows, everything works pretty well, except that it asks me for a username/password. The problem is that every place I've ...
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78 views

How to use the Fedora 22 Cloud RAW (.raw) image on VirtualBox

I've downloaded the RAW image of Fedora 22 Cloud to use/install on my VirtualBox installation under Windows but just don't know how to use it. I understand that it may be a dd copy of a filesystem but ...
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49 views

Why does the EPEL Repo fail on a Centos 7 VM on VMWare Workstation 11?

I created a Centos 7 VM on VMware Workstation 11 on a windows 7 host. I am trying to reach the EPEL repo using sudo yum update -y and I get the following error: [root@localhost vagrant]# sudo ...
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31 views

not able to login via ssh to Google VM

I am new to google virtualization and to the use of ssh key to login to servers. I have started a free trial to test a few things and everything was fine exept for the fact that after login in using ...
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1answer
45 views

unable to use umlauts/german keyboard layout in virtual machine

I'm trying to setup virtualization but am unable to use germany keyboard layout. The letters ö,ä,ü are not recognized when I try to setup the keyboard. The push of those buttons doesn't trigger a ...
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30 views

VMWare - Windows Update restarts host, guests lose data. Solutions?

They didn't like my question on Server Fault, so I'm asking here. I'm running Windows 7 Ultimate as both the host and the guest under VMWare workstation 11. I try to keep both host and guest running ...
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25 views

Virtual box network adapter stopped working

After trying out a virtual box snapshot from a friend. My other virtual machine's network adapter stopped working. My host system is Mac Os X 10.10, the guest system is Windows 7 (32 bit). ...
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78 views

how does vswitch work with the physical nic in vmware?

It is known that VMs, through their vNIC connect to vSwitch which is in turn connected to the physical machine or ESXI host's network adapter (vmnic). The vmnic is then connected to an actual L2/L3 ...
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12 views

VM Player install not working

I try to install VM player and it tells me to reboot the machine, I think its because I installed and deleted it before. I want to run Teradata developer (so Oracle VM does not appear to be an ...
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40 views

Cannot download from browser inside of my VM

Just as the title states, I am unable to download anything from the browser from within my VM. Forinstance trying to download a windows program called ActiveX from internet explorer inside of my VM, ...
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96 views

Openvswitch: multiple virtual bridges over one bonding interface

My ultimate goal is to configure a RedHat 6.6 server with Openvswitch as shown in the following image: Interfaces configuratión files are: ifcfg-eth0 DEVICE=eth0 ONBOOT=yes NM_CONTROLLED=no ...
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35 views

Need to reduce disk space used by Hyper-V virtual machine. Any ways to do this?

My Hyper-V server runs on Windows 8.1 Pro. There is a virtual machine I'm running, that's so important to me that I've taken about 8 snapshots. It is about to exceed the disk space on a 240 GB SSD ...
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49 views

Unable to resume KVM guest after rebooting host

I'm running KVM on Linux Mint 17.1, kernel 3.16.0-31-generic. The only guest is a Windows 8.1 VM. I've noticed that if I reboot the host while the guest is running, I'm unable to resume the guest ...
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71 views

Cannot access Win7 Oracle Database from Ubuntu VM

My main (physical) machine is Windows 7. I have installed a "homestead" Virtual Machine using VirtualBox so that I can develop a Laravel application in the VM. Homestead (the VM) runs Ubuntu 14.10 ...
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13 views

how to find IP address in Nat configured Vm using bridged network vm?

Here i have question is Bridged network vm is Kali linux Nat network vm is linux version os installed. Please let me know one thing how to find Nat configured machine IP using Kali linux vm's ...
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18 views

Can I inherit iptable rules on/under windows?

Don't really want to purchase a VPS just to test some iptables stuff for my gameserver. Was curious if it's possible to load up debian on vmware player and install nginx, nodejs, mysql, etc (which is ...
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30 views

Trying To Run a VM On Ubuntu 14.04 LTS

I cant seem to run a VM on Ubuntu 14.04 LTS, virtual box is reporting "Failed to load VMMR0.r0 (VERR_SUPLIB_WORLD_WRITEABLE)." I have tried all the fixes I could see on the bug reporting page of ...
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80 views

ESXi 6.0 and VM performance and oversubscribing resources (cpu/memory)

I have plans to buy a SuperMicro Server 5018A-FTN4 with 2.4GHz 8c Atom, 32GB (4x8) DDR3 Memory, and with 4 x 2.5" 750GB WD Black Drives. I do not want to run SSD's because ESXi does not support TRIM ...
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1answer
36 views

Setting up cluster with vagrant

I want to create a cluster of 4 CentOS VMs using Vagrant. I installed Vagrant and VirtualBox on my Widnows machine, downloaded the CentOS 64 box and created the cluster. Steps: Execute 'vagrant box ...
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24 views

How to find IP address of VMware ESXI server from a guest VM hosted on it.? [duplicate]

I have a Windows VM hosted on a VMware ESXI 5.5.0 server. I forgot the IP address of the ESXI server, now I am not able to access it from VMware client. I only have IP address of the guest windows VM. ...
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57 views

SSH issues when launching windows8.1 VM from vagrant

As described on title, I'm having some issues launching a win8.1 VM with Vagrant, where SSH never connects. The console display the error below: default: Warning: Connection timeout. Retrying... ...
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15 views

Google Cloud Instance web ssh Terminal Scrolling

For google cloud instance VM, the ssh terminal always doesn't automatically scroll to the very end. This becomes really annoying when the systems print out long info to terminal or you type so many ...
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1answer
48 views

VPN remote access to lan

I am rather new to this. I have done some it/cyber defense competitions in the past and have some knowledge. I am trying to set up a group of about 5-6 xenserver boxes. I want to use xencenter to ...
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44 views

What does it mean when a virtual machine can only run on x86 hardware? [closed]

I am learning about different kinds of virtualization. As I learn about this concept I am often times presented with documentation that says the virtualization software "requires x86 processors". I ...
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28 views

Can i install Hyper-v on a Virtual Machine with Windows Server 2008 or 2012?

I need to install Hyper-V on a Virtual Machine to have different OS to try my programs.My Virtual Machine is Windows Server 2008 R2 but if i need to i could change it to 2012.Could you explane it ...
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1answer
40 views

Error opening Ubuntu 12.04 LTS on VirtualBox version 4.3.16

I was working on my Ubuntu/Virtual Machine, when my laptop battery has discharged. After that moment, when I try to open Ubunutu on Virtual Machine I get the following error: There is no virtual ...
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11 views

Finding maximum number of VMs that we can run on a machine

Goal Goal is to find out total number of VMs that we can run on my machine which are generating given amount of load. Problem I want to generate some load inside the VM, say 25% of alloted cpu, 10 ...
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50 views

Trying to create a Big Endian environment using solaris 10 SPARC VM in Windows8 Host

I need a Big Endian system for testing. I am planning to create a Solaris Virtual Machine by installing Oracle Solaris 10 ...
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1answer
223 views

firefox 38.0.1 runs slow in virtualbox guest windows

I am making a new windows virtualbox image today, and just installed firefox from https://www.mozilla.org I have used firefox for years, and it has always being very fast and as responsive as my cell ...
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1answer
684 views

Error when starting VirtualBox (Unable to load R3 module)

I'm aware this question has already been asked, but the answer points to a website that is currently down and is relevant to a VirtualBox version that's old and irrelevant to my version/problem. I'm ...
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24 views

No Internet connection on VM

I can't seem to connect to the internet on my VM which is running Windows 8. I followed most of the instructions that I've found on Google or YouTube but it didn't seem to help. I can have a wired or ...
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2answers
53 views

Is it safe to install two different VirtualBox Guest Additions at the same time?

I was wondering if it is safe to install both Windows and Linux versions of VirtualBox Guest Additions? I searched around in google but couldn't find an answer. I need to make a vbox image that ...
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10 views

VMware - Debian 7 Wheezy System Manufacturer and System Model

For a Linux VMware Virtual Machine (vsphere), I'd like to change the "System Manufacturer" and "Model". I do not want to show the original biologic. Instead I want you to write the name of the bios ...
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41 views

Create an Azure Linux VM with a large os disk?

Does anyone know how to resize an OS disk on an Azure Ubuntu VM? Currently it's 29.3GB and I'd like to make it larger or create a new VM from a VHD with larger disk? Please know that I do not, at ...
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49 views

Self-created VHD image file won't boot in VirtualBox

I've got an old small form factor PC (x86). It boots from a CF card. I'd like to develop software for it but I don't want to use it for debugging since I might brick it. This is why I've tried ...
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24 views

How to determine if a clone of a VM is a linked clone or full clone?

I have two VMs . One is clone of another . How do I find if the given VM is a full clone or a linked clone of that VM as I want to delete the VM from which clone was created to manage disk space and ...
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1answer
21 views

Sharing existing ubuntu folder on host guest with Virtualbox

I am familiar with sharing directory between Ubuntu guest machine to host machine. But now I need to shared an existing ubuntu folder with the guest machine. I don't understand if and how it can be ...
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24 views

Connect Internet to Multiple HyperV VM's

I have 7 VM in HyperV 1 CentOS 4 Ubuntu 2 Win8.1 I want to connect all these VM's to internet. Internet is working on 1 VM only. DHCP is enabled in Virtual Switch advance options. Any help ...