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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Linux / JVM - OutOfMemoryError: unable to create new native thread

I have a memory problem with a Linux server (CentOS). It is a VM. Below is the context. It has 70Gb of RAM. There are 2 tomcat running on it. One tomcat is given a heap of 13Gb and the other one a ...
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3answers
195 views

NFS server on qemu guest

I need to know how I can mount block devices, placed on a qemu guest system, from host. So in this case we have NFS server placed on guest system and NFS client on the host's side. There are a lot ...
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2answers
382 views

Linux guest VM on mac host - Keyboard

I use a Mac as a development box, but am slowly transitioning to Linux. So I am spending the majority of my time in the Linux guest VM while working. But I still spend a fair amount of time in Mac ...
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2answers
365 views

Having issues installing Kali Linux in Virtualbox

Trying to install Kali Linux in VB and it freezes. I believe I have the correct version and a good ISO because it comes up and allows me to navigate to "install" Once I press enter, all that happens ...
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2answers
146 views

Create a CentOS Guest img over Ubuntu

I want to create a basic CentOS 5.8 system from scratch. for now i build my own img for Ubuntu Guest (debootstrap), my host is a Ubuntu 12.04.1LTS but I don't know how to make for a CentOS, is ...
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1answer
312 views

Convert Debian Live USB persistent filesystem to a standalone installation

How would I convert a persistent filesystem (live-rw) from a Debian Live USB to a standalone, bootable installation that can be run on a VM? What I've tried Chrooting and installing a bootloader ...
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1answer
145 views

How to make use of a real PCI modem in a Virtual Machine?

Is there a way where I can use my PCI modem in a virtual machine on an ubuntu 12.04 host box? I have installed Ubuntu 12.04 on the host and I want to use my PCI modem on a guest virtual machine. Can ...
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1answer
144 views

Can't boot properly after moving all files off then back on my VM drive

I have created an Ubuntu 12.04 32-bit VM in VirtualBox with a .vdi disk. I then mount this disk with qemu-nbd and move all the files off it; then back onto it. When I boot the VM again I get varying ...
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1answer
213 views

How may I Obtain a RHEL/CentOS in OVA Format?

My company has an internal cloud that provisions VMs either in an OpenStack (KVM) or a VMware (ESX) hypervisor. It already provides RHEL 6.4 on the KVM, but I've used up the max number of VMs from ...
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1answer
84 views

How to execute some shell script before VM suspend?

I have created one Centos VM. And I have created some IP aliases. Once I suspend and resume the VM my IP aliases are all going down. So I just want to capture the aliases address before suspend and ...
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1answer
148 views

How to use redobackup without free partition

I had a spare 250GB drive a while ago from an old Windows Vista computer. There wasn't much data on the drive. I wanted to use it for a new OS in my computer, and I was in a rush to use it, so I ...
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1answer
691 views

Setting up SMTP-AUTH & TLS in Postfix

So I have been in the process of installing a Postfix Server on my CentOS 6.2 Virtual Private Server. I have been following this tutorial: ...
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1answer
46 views

Where are my emails stored on CentOS 5.6

I have a CentOS 5.6 VM installation and currently have a handful of emails that I would like to get access to. When I run mail as root, I get: [root@dev mail]# mail Mail version 8.1 6/6/93. Type ? ...
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1answer
111 views

Install a basic CentOS VM on Fedora 19 with libvirt

I would like to install a CentOS 6.5 virtual machine on my machine, only with command line tools and basic networking capabilities, i.e a way to have http and ssh connections between the host (Fedora ...
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1answer
20 views

where to put some script to run before VM Suspend?

I have run one shell script before the vm suspend. How to do this? Where to put this shell script so that it will run before the VM suspend .
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1answer
204 views

Samba daemon hammering CPU on CentOS 5.6 VM on bootup

I have a problem where my Centos 5.6 VM is running very slow on my Win7 machine, and looking at top I can see that the Samba daemon smbd is sitting at the top of the list hitting the CPU big time, ...
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0answers
62 views

How do I setup an IP address on my virtualbox VM?

I have a VM which I run on VirtualBox like so ... $ VBoxManage startvm --type headless dev-006 ... and I can see that NIC1 is "Bridged" and setup like so ... $ VBoxManage showvminfo ...
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0answers
73 views

Creating a private network for internal VMs

I am trying to configure a private network for use with my Xen VMs, in addition to the public network in use by another of the VMs (VM1, which has its own public IP). So far, I have the public side ...
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1k views

PCI passthrough with Xen

I am trying to run Windows XP in a Xen DomU virtual machine with a PCIe device, for which there are no Linux drivers, being passed through from a Debian Squeeze Dom0. My hardware supports ...
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0answers
242 views

Connect to a VPN from a Linux Virtual Machine

I am running an Ubuntu distro inside a VMWare virtual machine with a bridged connection on a Windows 7 host. What I am trying to do is to have the virtual machine connect to a VPN, but I'm not having ...
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0answers
64 views

PowerVM lpar specific cpu/mem info

I want to get the CPU and memory allocation information from lpars of PowerVM through HMC. I have used lshwres -r proc -m <ms> --level lpar lssyscfg -r proc -m <ms> The fields of ...
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0answers
136 views

VirtualBox appliance import locks up system

I have a Windows Vista x64 appliance that I am trying to import into the Open Source Edition of VirtualBox on Linux Mint 11 x86-64. The ovf file is 21.3 GB in size. The problem I am having is that ...
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303 views

Virtual machine hangs when trying to login after beeing idle for som time

I'm using Microsoft Virtual PC 2007 to run a linux virtual machine, but after some time I can't login to it -- not from the instance on the localmachine or ssh in to the machine. Both give the same ...
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9 views

A Way Around: Host Accessing Guest in Internal Network?

folks. I have installed a Linux virtual machine in VirtualBox with 2 adapters: vnet0 is a host-only network and vnet1 is an internal network. I am able to get the IP address given by vnet0. ...
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23 views

Installing Virtual machine on a virtual Machine

I am implementing Oracle RAC using 11.2. For shared disc option and low cost, we are planning to use Virtual Machines. I have installed one virtual machine (PARENT) Specifications: Oracle Linux 5.8 ...
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63 views

Pentesting from a virtual machine, hiding the host

I want to install Kali Linux as a virtual machine in VirtualBox for pentesting wireless routers and network hosts. I want to hide my host OS, which is Windows 8, so that other machines see my computer ...
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62 views

sharing folders in virtual box

I'm trying to run a Linux Mint guest inside a Linux Mint host(both 64-bit). I've installed Guest Additions etc. But I'm not able to access the shared folder. sudo mount -t vboxsf kernel ...
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0answers
519 views

Connecting to a serial port with VMWare ESXi and Ubuntu

Using VMWare ESXi 5.0.0, having a guest OS Ubuntu 12.04.3, upgraded to the date 05 january 2014. I've added "Serial port 1" to the Ubuntu 12.04 guest OS (let's call it "MyUbuntuPC"). Serial port 1 is ...
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0answers
45 views

Why PowerVM LPAR CPU utilization is negative

For a specific case I compute an PowerVM LPAR CPU utilization to be a large number less than zero. I am fetching the lpar sample event using: lslparutil -r lpar -m P750 --filter "lpar_names=i5lp5" ...
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0answers
76 views

omap3530/3630 emulation on QEMU for overo and beagle machines

On QEMU's source code for beagle and overo I can see that the cpu emulated is the OMAP3430. I will like to know if it's a way to make QEMU emulate OMAP3530/3630 cpu's for those machines? On bealge : ...
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0answers
137 views

Network in LXC not forwading through a bridge

I've got an LXC container, on the host I've got a bridge between the LXC container and eth0. The LXC container can ping it's Host 10.1.0.5, but can't ping the gateway of 10.1.0.2. The host is able to ...
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0answers
424 views

Problem getting Fedora to run in VirtualBox

I'm using Ubuntu 12.04 64-bit, trying to get Fedora 18 64-bit to run in the Oracle VM VirtualBox. I've got VirtualBox installed (via the .deb package available from the official site,) and I got the ...
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0answers
192 views

not all initrd.img's are born equal?

I am trying to get a Red Hat 5.8 box booting via pxe. The box is a virtual machine on ESX5.0 it has a Paravirtual SCSI Controller and VMXNET3 network driver. Now these drivers do not come default in ...
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0answers
137 views

Unmanaged VPS bought today. Sendmail not functioning correctly

I purchased an unmanaged VPS today. I moved my website on over, and when I try to send an email. It returns a blank page. Not to mention I had to install PHP myself. Apache was there, for some reason, ...
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26 views

How do I install Arch using an older kernel? No ISOs seem to exist

This is my first time in Arch, and I'm following this tutorial: http://www.youtube.com/watch?v=KSGWiFOp_7o&list=PLj97-HQdMXyZSvMD1xRTqPEeh4nSA6dpC which is great, except that I can't go any ...
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0answers
80 views

kvm/qemu linux guest vm wont boot

host linux (kvm/qemu/libvirt) guest linux (slackware) the slack vm pauses just after Loading Linux-virtio...... message. it's stuck in paused state. i think i shutdown the host without shutting the vm ...
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0answers
21 views

Scripting vmware-player with Windows in Linux

I have a Windows XP virtual machine, that I run with vmware-player on Linux. In the virtual machine, I have a .bat script that reads some input from a given place (insite the machine's virtual disk), ...
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115 views

Xubuntu 13.10 on Dropbox

I have a Mac OS X 10.5.8, and I would like to use Linux on a virtual machine. I use Dropbox, and the most modern version I can run on my PC is Version 4.1.8. I created a virtual machine running ...
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0answers
81 views

fstab doesn't mount after boot of a virtual machine

I created virtual machine out of WordPress turnkey appliance (I believe it's based on Ubuntu) inside Virtual Box. I am able to mount a folder on turnkey from the host (Windows7) manually. So I added ...
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0answers
144 views

In virtual machine manager, is there a way to add disk space to an existing disk?

I know that in virt-manager you can add RAM and processors to the virtual machine, but is there a way to increase the available disk space larger through the GUI? Edit: @slm was able to find the ...
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0answers
36 views

Install Fedora/Ubuntu from its source code using virtual box

How can I compile Fedora/Ubuntu from its source code by using some kind of virtual machine? Actually I want to trace some signals; especially termination signals SIGTERM SIGINT and SIGKILL. ...
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0answers
64 views

How to start a GUI program in a VM with PHP

I have an Ubuntu 12.04 VM running on my online server where there is no display attached. I want to start Teamviewer there on that VM to get graphical access to that server. I guess I have to give ...
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0answers
51 views

Transfer speeds through PPTPD VPN are throttled

In an effort to improve my understanding of Linux, I decided to setup a VPN for myself to route my internet traffic through. After about 8 hours, I finally had a Debian Squeeze VPS setup with pptpd ...
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0answers
118 views

Can I run hostapd in a virtual machine hosted in a windows system?

I would like to know if it is possible to run any Linux/UNIX distribution with hostapd in a virtualized environment. My idea is to host a small virtual machine, which will use my Windows Host ...
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576 views

Slow Internet Speeds with Backtrack5 R2 in VMware Workstation

I have been trying to get Backtrack5 to run smoothly on my new laptop and have run into a few issues. I have installed a version of Backtrack5 onto another laptop previously as the primary OS, and ...