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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Question about CentOS and KVM virtualization and PCI Passthrough

I want to replace Windows Server 2012 R2 and Hyper-V on my homeserver with CentOS and KVM. My plan is to virtualize one Windows 8.1 machine and several smaller Linux machines like on Hyper-V, there is ...
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130 views

Using of qemu-system-x86_64 with key -enable-kvm on VirtualBox

I have windows 7 as host. I launch virtualbox with ununtu 14.04 on my Windows 7. I try to launch debian inside Ubuntu: qemu-system-x86_64 -enable-kvm -hda disk.img -boot c -m 256 -localtime. Another ...
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27 views

CentOS Black Screen after 4+ hours of indexing

I am running a CentOS virtual image on virtual box. It has liferay and solr installed on it and I am trying to index a Lar file that is 50+ MB of metadata. This is estimated to take more than 12 hours ...
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22 views

VirtualBox state suddenly SEEMs to have been restored to an earlier time

I have CentOS 7 installed on my Windows 8.1 VirtualBox, and file-system sized 30Gb. It worked fine until this morning, then the storage became full (due to Downloads and Projects). I tried a tool ...
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2answers
31 views

Cloning a drive larger than your own

I made this nice backup system to turn drives into vdi's and put them on our network share. Then the next day my boss walks in with 20 new machines to replace our old ones, they have 2TB drives. How ...
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60 views

Linux Desktop VDI from thin client

I checked VDI Solutions Like VMware Horizon, Citrix Etc. all gives Windows VDI. Is there any solution I can load Ubuntu Desktop Or Centos Desktop image from any thin Client
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1answer
147 views

Unable to connect to internet from Centos VM

I am using VirtualBox 4.3, I have installed centos 6.3. I have two adpaters attached. 1) NAT 2) Host-Only I want to be able to setup a cluster of 3 machines which can talk to each other and also be ...
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90 views

SSH to a virtual machine

I recently installed a Linux (Mint 17) virtual Machine on a Windows 7 PC. In order to be able to SSH to this virtual machine, I had to define a few rules and redirect ports as explained in other posts ...
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71 views

Unable to get kickstart file from locally hosted http

I'm trying to get a vm up using a kickstart file. However, whenever the virtual machine initalize, it says it is unable to located the kickstart file from the location provided. Code to build vm: ...
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3answers
539 views

What are benefits and downsides of unprivileged containers?

The technical explanation of what is unprivileged container is quite good. However, it is not for ordinary PC user. Is there a simple answer when and why people should use unpriviliged containers, and ...
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51 views

Using ks.cfg with virt-install?

I've been trying to get a virtual machine working with a cfg file on centos but unfortunately, I'm getting the error that ks.cfg file does not exist. Below is the command I ran to enable the VM. ...
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49 views

Authenticating a virtual machine against a git server

I have a CentOS 7 VM hosted on a Scientific Linux machine (Both branches are Red Hat). I'm using docker as the SW to emulate CentOS over SL. Communication between both is done through a bridge (a ...
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76 views

CentOS 7 boot hagn in VmWare

I have installed CentOS 7. It was working fine until today that it hangs. After several initial lines of ...driver cache write through... it goes to the next black screen with a _ keeps flashing. I ...
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1answer
50 views

Understanding ssh X11 forwarding

I have a rather odd setup I'm trying to get working. I have an Ubuntu install running in a container (through Proxmox). The host computer is CentOS. Neither server is running an X instance. My host ...
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1answer
376 views

Qcow2 snapshots - snapshot for disk vda unsupported for storage type raw

I am running a KVM server (Ubuntu 14.04) and would like to take snapshots of my guests. I was reading how about how to do that in this article. It seemed as if I should be able to take a snapshot of a ...
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56 views

kvm console not working at login [centos on centos]

When I run the following $su $virsh console myvm I keep getting login incorrect , even though I'm typing the correct password. In fact, it does work if I use virt-viewer. What could it be?
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77 views

Home server bottleneck (filesystem server)

I am trying to set up a filesystem server, so that I can use my various laptops to transparently mount a directory containing many VirtualBox VMs, some of which run full graphics environments. I will ...
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1answer
27 views

Virtulisation IPTables Rules

I haven't been able to find a solution this as of yet. I'm not very experienced in IPTables so any support you can provide will be appreciated. I have a server with a few VMs on there. The main node ...
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30 views

OSX under Linux VM on Macbook PRO

I have a Macbook Pro, with Parallels installed, within which I have OSX Mavericks, Windows 7, and Ubuntu VM's. Its possible to install OSX Mavericks as a VM, because the hardware is a Macbook Pro. ...
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147 views

How to install UNIX In a virtual machine?

I got a laptop running Ubuntu 14.04 and I want to install some abandonware in virtual machines with VirtualBox and I chose to begin with AT&T UNIX 4 Version 2.1. I allocated for this machine 512 ...
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186 views

Create disk space on Vagrant/VirtualBox guest

I am looking to expand my VMs storage space and have done it the following way: Moved Vagrant to an external hard drive Reformatted the box to .vdi, resized it, formatted back to .vmdk Re-added the ...
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63 views

Configure networking settings in SL 7

I installed the last version of Scientific Linux on to VMWare Workstation 10 (on Win 7). I downloaded SL-7-x86_64-DVD.iso on the SL website. After which, I don't have internet connection whereas when ...
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1answer
23 views

libvirtd and filtered ports

I am new to virt-manager. After having configured a virtual network (new interface virbr0) with 2 VMs that should be able to communicate, I discovered that most ports are filtered. For example, the ...
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1answer
149 views

virt-manager: is it possible to assign specific IP addresses to certains VMs via the virtual DHCP?

using virt-manager quite successfully. I am wondering if it's possible to specify in the virtual DHCP server, that some virtual machines will have a specific IP address (maybe via MAC address ...
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83 views

Installing generic-logos and generic-release on Fedora

The guidelines for Fedora remixes suggest to replaces packages fedora-logos, fedora-release, and fedora-release-notes with the generic-* equivalents when making a remix. Most tutorials online focus on ...
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43 views

GParted doesn't recognize my newly resized vdi

Before I describe the problem, I'd like to specify that I'm not confused about the size of the partitions (they haven't been extended yet, so of course they haven't grown) but the size of the actual ...
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57 views

Multicast is not received using Java on Linux

Setup is as follows: host windows machine, 2 VMs with a Host-Only Network adapter and a NAT adapter. Java program on one VM that sends a UDP packet to the following address ...
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701 views

How to setup unprivileged LXC container without reboot?

I am writing some bootstrapping scripts, and I can't get usermode LXC containers working on vanilla Ubuntu 14.04 headless without a reboot. Here is what i do. First, I download and install Ubuntu ...
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2answers
118 views

Wine or VirtualBox for Windows proprietary software installation?

I just bought a Windows proprietary software which appears to store license keys in their internet database right after installation. After purchasing, I was provided with 1 license key, and it is ...
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154 views

vmxnet3 multiqueue support in vmware workstation

I'm working on an application based on RSS multiqueue(receive side scaling), and testing it on vmware workstation, but found that vmxnet3 nic have problem with RSS. My linux virtual machine has 4 ...
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1answer
61 views

Memory Required for SSH-only Linux Setup

I am attempting to set up a minimal Debian or CentOS installation for internal network access. The purpose of the setup will be to allow SSH access into the rest of the internal network—that's it. It ...
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0answers
82 views

Proxmox server VM growing than what i have assigned for VM disk space

I have only 2 VM's in one of the SSD hard disk server, Hard disk size was just 120 GB. I have assigned 32 GB for each VM's but now there is only 1 GB space left in /var/lib/vz. While listing the size ...
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72 views

acedemic projects related to linux virtualization and security [closed]

I am B.tech student iam totally confused with the topic virtualization. but i selected linux virtualization security as a project in my college. please guide me. i tried in google but i found so many ...
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Differences between Kernel-based virtualization and Container-based virtualization [duplicate]

What is the differences Kernel-based virtualization and Container-based virtualization ?
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2answers
829 views

How to create user cgroups with systemd

I use unprivileged lxc containers in Arch Linux. Here are the basic system infos: [chb@conventiont ~]$ uname -a Linux conventiont 3.17.4-Chb #1 SMP PREEMPT Fri Nov 28 12:39:54 UTC 2014 x86_64 ...
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1answer
37 views

will libvirt don't create vnetX tun device?

When I create the vm instance using libvirt, it will create a TUN device named vnetX. I wonder would libvirt don't create the vnet device, instead, I use other method to create it.
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146 views

Virtualbox vboxmanage clone does not show up in virtual machine list

I have a virtual machine that I am cloning with the command line interface to virtualbox like so: vboxmanage clonevm origVM --name origClone However, the clone is added to the directory ...
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1answer
51 views

Virtualbox list vrde port for vm on commandline

I have a Virtualbox VM that is configured with VRDE for remote access using RDP. I'm familiar with how to set the vrde port, but for a given VM I have not found a way to query the current vrde port ...
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34 views

Can't Create Win 7 VM with RHEL 6.5 VMM

I have a server running RHEL 6.5 that I primarily run VMs on it. The VMs I run on it are all Linux, with the exception of one that runs Server 2008 R2. Yesterday, I attempted to install Windows 7 as ...
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1answer
61 views

How do I install sfx files in Debian [duplicate]

I want to install a virtual machine, and i need to install a SFX file. I know the command for Ubuntu is chmod +x filename.sfx But I don't know the command for Debian. Does any one know? Please ignore ...
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2answers
76 views

Two virtual machine instance with same network on same host

Is this possible to have two (or more) instances of a virtual machine on a host with the same IP address (like 192.168.0.X)? What are the possible ways of implementing this? I need the two virtual ...
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1answer
41 views

Understanding NAT concepts

I began learning networking on Linux, and I am looking for a way to associate a particular IP to a particular MAC address (i.e. a way to edit the NAT table?). Actually I am trying to assign some IPs ...
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0answers
85 views

centos virtual machine not registering with intranet dns server

When I am creating a Ubuntu virtual machine on virtual box it automatically registered with DNS server in my intranet network, it has both intranet IP and domain name. When creating CentOS virtual ...
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1answer
268 views

Getting an already installed Android x86 partition to run on KVM

(Originally posted on SuperUser here, but posted here due to lack of responses.) I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set ...
2
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2answers
500 views

how to pass Ctrl-C in qemu

I configured Qemu's grub the following way: GRUB_TERMINAL="serial console" GRUB_SERIAL_COMMAND="serial" GRUB_CMDLINE_LINUX="..console=ttyS0" and run the Qemu process with "-nographic" command line ...
3
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2answers
495 views

What is a Linux container and a Linux hypervisor?

I looked at the stackexchange site but couldn't find anything. I looked at the wikipedia entry on Linux container https://en.wikipedia.org/wiki/LXC and as well as hypervisor ...
2
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1answer
113 views

Share wireless card with Arch Linux on VirtualBox

I'm developing a software that needs to access the list of wifi networks in Arch Linux. This is easy, just run iwlist scanning. The problem is: I'm running VirtualBox on Mac OS X and when I run this ...
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82 views

Multiple domains with one public IP?

Hosting multiple domains on seperate servers but only one public IP address with ProxmoxVE... How can I do this with an easy and quick solution? The individual servers behind the router should be ...
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1answer
2k views

Why is my Mac, upgraded from Mavericks to Yosemite, no longer giving VMware Fusion needed resources?

I have a Mac upgraded from Mavericks to Yosemite. When I tried to run VMware Fusion, I got an error stating: Could not open /dev/vmmon: No such file or directory. Please make sure that the kernel ...
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1answer
56 views

What are the diffence between virsh, virt-install, and virt-manager?

I know all of virsh, virt-install, and virt-manager can manage the virtual machines. However, what are the difference between the three?