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

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How can I change the amount RAM in a virtual machine without powering off

I have a VM in my computer in a saved state. The RAM assigned is 8GB. When I start it then it gives error as HOST RAM is less than RAM on VM. However, to reduce the RAM I need to power off the VM. ...
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31 views

Networking between two VMs on different host adapters having different subnet in VirtualBox

I want to make a network between two VMs on different host adapters having different subnet in VirtualBox. The base OS is ubuntu, I did a source based ping using this command but ping is not ...
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2answers
70 views

Increase VM RAM memory size

I have Ubuntu VM running on Windows 8 WMware host computer. I would like to increase it's memory size, but looks I have no more sliding bar available to do that. How to increase the memory size ...
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2answers
385 views

virtualbox, cannot ping internal network from host

I have two virtual machines running (mars and saturn): I want them to be able to ping each other, for this, I set up an internal network adapter on both virtual machines. Here you can see network ...
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0answers
33 views

Swapping from Windows 7 to Ubuntu (host) and Windows 7 VM on same hardware

This may have been asked elsewhere, but it always seems to be unclear about whether they are staying on exactly the same physical hardware. I have Windows 7 32bit with lots of programs installed (inc ...
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33 views

Find software/resource allocation changes on virtual server within last 24 hours

I am using a virtual server for computational tasks involving a NVIDIA GRID K2. An IT department is administrating the server. Within the last 24 hours the server has been rebooted and now I get the ...
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27 views

cloud based gaming computer

So I have a question about the feasibility of running an instance for intensive gaming (First person shooters mainly)... First off, I'm talking about making a local cluster running openstack on an ...
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2answers
43 views

Using VMWare to muti boot OSes virtually?

What I mean is that I want to be able to install Windows, Ubuntu 15 and Arch Linux on the same VM in a multi-boot like setup. How might I do that? When I create a new VM in VMWare, I am asked to give ...
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1answer
57 views

Is it possible to run a VM from a server into another motherboard and use the on-board GPU?

So let’s have a hypothetical set up: The computer uses an AMD server motherboard, running dual CPUs. Could you pipe the virtual machine data from the server into a workstations motherboard—say a micro ...
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2answers
59 views

Can access VM Guest IP from Host but not from other computer on same LAN

I am hosting a web application on a Linux (CentOS 6.7) Virtual Machine guest, that is sitting on a Windows 7 host. I have configured a bridged network connection between the host and the guest, and ...
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12 views

Creating a reusable “template” for desktop-vms

Im trying to create a VM for all of my development stuff. Im looking for a way to hold it as generic/reusable as possible. I mean I want to create a vm which supports all the basic tools I always need ...
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1answer
33 views

Change Virtual Machine hardware?

I am running Windows 7 64-bit and running Mac OS X Yosemite inside a virtual machine. However inside that virtual mac I need to run Windows inside a Virtual machine. (I am doing something for a friend ...
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40 views

VirtualBox guest can't ping or RDP other guests, can reach host

I have VirtualBox 4.3 on Debian 8 (brand new install from repository) with a couple of Win 2012 guests running in full GUI mode. I was so excited yesterday when I finally figured out and realised how ...
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1answer
134 views

How to access a Virtual Machine webserver from outside the network

I have installed a virtual machine for using an ERP through webserver. I have configured the network as NAT. All of my computers attached to the local network can access the webserver by typing the ...
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2answers
120 views

Static IP for local server (VM)

I tried a lot guides but nothing didn't really help/ worked (for) me. What I would like to do is to host a server in my local network with a static IP. I have a Linux Mint VM inside Virtualbox which ...
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318 views

Oracle VM: “No space left on device” But Space Exists

I have Oracle 5.0.8 VirtualBox Manager. I am running Kali Linux as a VM inside this manager. This VM has a fixed size of 16 GB. I recently ran a dist-upgrade inside the VM and it ran out of space ...
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1answer
27 views

Virtual machines, TRIM, spares files

Assume the following: I have [an SSD with] a host file system (FS) and a host OS. The virtualization software uses a file on the host FS as storage for a virtual machine (VM) disk image. The guest OS ...
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1answer
116 views

Is it possible to use Hyper-V VM without booting into host OS

I'm a newbie in Hyper-V / Virtualization. I'm trying to explore the Hyper-V feature that came bundled with Windows 8.1. On reading some online tutorials, here what I discovered about Hyper-V. ...
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59 views

No internet for vm player that's installed on windows 10 since upgrading from win8.1

I had windows 8.1 and vm player that had ubuntu and win7 virtual machines on it. It was all working fine. My workplace has proxy so I had setup proxy on both guest oses and it was all okay. I ...
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32 views

Hyper-V private/internal network providing ipv4 address

I have Ubuntu 15 running under Hyper-V. When I use external network then the VM is assigned with an ipv4. When I switch to internal or private network, the VM is assigned with an ipv6 instead. A side ...
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1answer
76 views

How to share a Mac OsX host folder to a Win Srvr 2008 virtualbox guest so that it can be mapped as a network drive (no Vbox shared folder)

I need to share a Mac OsX (El Capitan) host folder to a Windows Server 2008 virtualbox guest machine so that it can be mapped as a network drive. **I can't use VirtualBox shared folder ...
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2answers
102 views

Virtualbox/VMWare on USB3 SSD?

I'm investigating whether we (at work) should move our virtual windows machines from our local harddrives to one external USB3 SSD. Background: The "problem" many of us have Macbooks and PCs with ...
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19 views

Debian GNU/Hurd on Virtual Machine not working

I am trying to install Debian GNU/Hurd on Virtual Machine on Windows, I tried different .iso, created images, installed step by step however each time I start it stops at this part: start extfs2: ...
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2answers
279 views

What is the difference between a Java virtual machine and a VMWare VM?

I know that they are both called 'virtual machines', but what is the exact difference?
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19 views

Converting a dynamic VDI to a static VDI of the same actual size instead of the virtual size

I have a dynamically allocated VDI with an actual size of 11 GB and virtual size (i.e. maximum limit) of 25 GB. The VDI hosts a Debian system that has one partition that is slightly less than the ...
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1answer
28 views

VMWare How to share the connection between a NAT and a host-only network?

I have 2 VMs running. (On Ubuntu 14.04) The first one has 2 network adaptater (NAT and host only) The second one has 1 network adaptater (host only). The first can ping google.com. The second one ...
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1answer
4k views

How to install VMware Player 12 on 32-bit Windows 7?

Today downloaded VMware Player 12 to my Windows 7 Ultimate 32-bit laptop. I am trying to install it but get the error This installation package is not support by this process type contact product ...
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3answers
73 views

VirtualBox host only adapter has no address

I have trouble setting up VirtualBox host only adapter on Arch Linux. The output of ip addr is: 5: vboxnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default ...
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1answer
195 views

Vagrant unable to start VM after Windows Update

All of a sudden, I am no longer able to boot Vagrant VMs. Here is the error: default: Warning: Connection timeout. Retrying... default: Warning: Connection timeout. Retrying... default: ...
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85 views

Will fragmentation of a virtual machine's disk also cause host OS disk fragmentation?

I run a number of virtual machines using VMWare Player on top of host Windows 7 OS. Let's say I am using the VMs for everything from web browsing to actual work, file transfer, etc. for a long period. ...
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1answer
189 views

VMWare NAT not populating ARP with IP/MAC from VMWare host only?

I ran into a problem while penetration testing with Netdiscover on a virtual set up using VMPlayer, free version. The attack machine is on the VMWare NAT network interface, and the target machines ...
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25 views

Linux VirtualBox cache disk writes

I have a Windows 10 guest in VirtualBox on an Ubuntu 15.04 host. Being Windows, it generates a lot of disk activity which slows down my host system and places excessive wear on my otherwise ...
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1answer
59 views

Shared folder on uBuntu VM

I'm running Windows 8.1 as the host and uBuntu 14.04 LTS as the guest OS. Oracle VirtualBox 4.3.18 is in use. I have two guest VMs, one Windows XP and the other uBuntu 14.04 LTS. I believe I've ...
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2answers
247 views

How to transfer file from Windows95 in VMWare to Host OS?

How can I transfer files from Virtual Windows 95 to Host (Windows 10) ? I tried many things: Enable copy and paste in Guest Isolation Enable shared folders option but it isn't supported in Windows ...
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18 views

Establish a fixed IP on Windows VM guest on Mac host (VMware Fusion 6)

I have a windows VM running a development web server from visual studio. I can connect to it from my Mac browser at the machine's local IPv4 address. The problem is that every time the host machine ...
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2answers
467 views

How to change password for Gentoo LiveCD in 2015?

I have a LiveCD from Gentoo. Gentoo still does not offer an installation option, so I planned on working from the ISO image and saving VM state after configuring the VM. To configure the VM, I need ...
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26 views

Networking scenario for multiple virtual machines on a host

I have a physical machine hosting 3 virtual machines and im using virtualbox. 2 VM's are simple machines that just need to ping each other (lets call them G1 and G2) whereas the 3rd VM has openvswitch ...
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1answer
75 views

How do I sync the time on my Linux Mint VM with my Windows 7 host?

I'm running Linux Mint 17 VM using VirtualBox on a Windows 7 (host). I've followed the steps found here and installed all three packages, but I still can't make the time sync with the host.
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144 views

VERR_VMX_IN_VMX_ROOT_MODE when running VirtualBox with libvirt installed

I'm running RHEL 6.4. I had been using a VirtualBox VM to run a simulator, but recently installed libvirtd for a different project. Now I want to run my VirtualBox VM again, but keep getting an error ...
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1answer
349 views

Does running a VM harm the hardware?

I wonder if I'm reducing the life of (or harming in another way) the components of the PC? What if the PC is shared? Other than hard drive space, it should not harm any other operation of the ...
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1answer
287 views

VT-x is being used by another hypervisor

I am trying to set up a virtual machine using Virtualbox: Host OS: Windows 7 Guest OS: Ubuntu Virtualbox version: 5.0.10 Processor: Core i7-5600U But when I try to start the VM I got the following ...
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1answer
4k views

failed to start Virtual Device in Oracle Virtual Box

I was tired to do everything indicated on net. I am using Genymotion to start virtual device but when i start device it's gives me that error Note: When i start virtual operating System Linux it's ...
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1answer
35 views

Automatically start up Virtual Machine and run a script within the VM

I'm looking to automate a certain process. On my host machine, I would like to start up an instance of a VM, and once the VM has loaded, run a command line script contained within the VM. I would also ...
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0answers
193 views

Installing VMs in CentOS 7 host from ISO?

I'm trying to install a CentOS 7 guest in a CentOS 7 host, using text only. I'm using simillar commands as: virt-install --name centos7 --ram 1024 --disk path=/var/kvm/images/centos7.img,size=25 ...
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42 views

Hyper-V network adapter lagging, connection dropped

We are using Hyper-V on Windows Server 2012 R2 on physical machine PM1 with one VM hosted. The box has 2 NICs, one for physical layer, second used by virtual switch. From time to time, the network ...
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1k views

No VGA and sound driver installed in XP guest machine in Hyper-v virtualization?

I have a Windows 10 host with 1 XP virtual machine using Hyper-v. However after installing XP for the guest machine, I don't see any VGA or sound driver, so the performance in guest machine is a ...
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Error “WinVerifyTrust failed with hrc=Unknown Status” when launching a guest machine on VirtualBox

After working flawlessly for months, all of a sudden I cannot launch guests on VirtualBox. When I attempt to launch a VM, I receive the error: WinVerifyTrust failed on stub executable: ...
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0answers
42 views

Vboot vs open source grub?

I'm trying to use vboot from vmlite to boot my computer from a vhd and there are two downloads available the trial version of vboot and the open source grub used in vboot. What is the difference ...
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5 views

How to alter contents of virtual Android device

I need to alter hosts file of a virtual Android device in Windows environment. I tried yaffey tool (3y old), wasn't able to even list the contents.
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0answers
51 views

Hyper-V connection sharing kills my host's internet connection after a while

I'm using a setup where I have an ethernet connection on my host (Windows 8.1) set to share with a Hyper-V internal switch, then my VM (Windows Server 2008) connects to that. It works for a while ...