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.

learn more… | top users | synonyms

1
vote
2answers
87 views

Linux VPS Configuration

I just recently got my hands on a linux (Fedora) VPS and I would like to ask if there are special configurations that I have to be wary of. Do I still configure it like I would configure a normal ...
1
vote
1answer
895 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: ...
4
votes
1answer
309 views

Can you Chroot a program from an OpenVZ environment?

I just recently purchased a Virtual Private Server, and it is OpenVZ virtualization. I am setting up my LAMP stack, and in the past I have always just set up my BIND dns set up in a chrooted ...
7
votes
4answers
4k views

Convert image of a partition into image of a disk with partition table

I have an image of an existing partition generated with dd if=/dev/sdXN of=image.bin. Now I want to use this image as the basis for a virtual machine. I know how to convert the image into a format ...
2
votes
2answers
10k views

Cannot connect to my Virtual Box Ubuntu system

I have a VirtualBox running an Ubuntu OS. I'd like to access this Ubuntu machine using ssh or telnet. In order to do that I've performed the following steps: sudo apt-get install telnetd sudo ...
1
vote
2answers
967 views

Different domains for multiple VM's on host with one WAN IP

I've got only one WAN IP address bound to KVM host system and multiple VM's with internal IP's, say, 10.0.0.1/28. On the other hand I have multiple domain names bound to host system WAN IP. The ...
2
votes
1answer
423 views

How can I run `hackxor` inside VirtualBox?

I've found hacking game hackxor, but it's made for vmware. I don't have any experience with vmware and I don't want to install it in my machine. So I'd like to run hackxor inside VirtualBox if it ...
2
votes
3answers
327 views

Is there such thing as a “free” equivalent to Microsoft Virtual Server?

As the title says, is there? I'm a student, I'd love to play around with this technology without the fear of my licence disappearing the day I graduate from college (as it might with the Microsoft ...
3
votes
1answer
4k views

My VirtualBox Virtual Machine doesn't detect my USB attached disk

I'm using the latest version of both Virtual Box (4.1) and CentOS (6.2). I would like my Western Digital USB drive to be recognized by my VirtualBox guest operating system. My host system, Windows ...
127
votes
16answers
32k views

Any reason NOT to run Linux in a VM all the time?

I've switched to using Arch Linux for most of my day to day work and don't need Windows for anything but gaming and the couple of apps that aren't ported to Linux like OneNote. My Linux distro is ...
0
votes
0answers
626 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 ...
3
votes
1answer
6k views

VirtualBox guest using Bridged networking unable to obtain DHCP address

I have a computer, called Loki, that works as a virtual machine host and DHCP server. The DHCP daemon is listening on port eth0. Part of /etc/dhcp.conf: subnet 192.168.13.0 netmask 255.255.255.0 { ...
9
votes
3answers
16k views

VirtualBox: two network interfaces (NAT and host-only ones) in a Debian guest on Ubuntu

I created a Debian VM on VirtualBox with two interfaces: a NAT one (for accessing internet) and a host-only one. However, I do not know how to make both interfaces work at the same time. If I the ...
1
vote
2answers
4k views

Partitioning for Web Servers

I was curious what some general best practices are in relation to partitioning for a new Linux VM that will be used as a web server? Are there certain guides that should be consulted or followed? ...
3
votes
3answers
4k views

VNC send Ctrl+Alt+F1-F6 to server

I've been trying to figure this out now for a while, I'm connecting to virtual machines through VNC, and by default you get a graphical or ncurses interface, and CTRL+ALT+F3 takes you to a console ...
3
votes
1answer
2k views

Virtual unix command-line environment on the iPad

Is there a lightweight virtualized Linux or other unix environment that I can run on the iPad? Like VirtualBox for iPad. I only really need a minimal system — something along the lines of Microcore ...
2
votes
3answers
567 views

Command line friendly virtual machine

I've been using Virtualbox for a while now, but the only way I've learned to interact with it is through the graphical interface. Is there a way for me to send bash commands to the vm through the ...
2
votes
1answer
421 views

How to extend an ext3 partition over LVM inside a file (virtual machine)?

I need to extend the root partition of a virtual machine (VM) using LVM (Logical Volume Manager). I can afford a few minutes of downtime so a VM shutdown/reboot is fine. The virtual hard disk is in ...
6
votes
4answers
8k views

Booting the already installed Windows from the VirtualBox installed in Ubuntu

I want to boot the Windows which is installed in laptop's internal harddisk(/dev/sda1) from the VirtualBox installed in my Ubuntu. Can somebody tell me how to do this in VirtualBox.
9
votes
4answers
2k views

Lightweight isolated linux environment

I want an isolated (guest) Linux environment on my computer that I can mess up without worrying about the host. E.g. install a lot of stuff from source without package management, pollute environment ...
0
votes
0answers
29 views

How to access the data stored in guest operating system(i.e Virtual machine) from Host system [duplicate]

Possible Duplicate: Share memory between a virtual machine and the host I wanted to access the data stored in virtual machine from my host machine. I know that each VirtualMachine will have ...
3
votes
3answers
1k views

Share memory between a virtual machine and the host

Through shmget and shmat, I am able to access the data stored in one program from another program. Here's the gist of the code: key=ftok("shared.c",'c'); shmid=shmget(key,1024,0644|IPC_CREAT); ...
2
votes
1answer
295 views

Virtual machines on different X servers

Is it a good idea to run virtual machine on a different X server? I can switch between them using Ctrl + Alt + Fx shortcuts. If my default X server hangs/crashes, I can still continue to work with the ...
2
votes
2answers
1k views

strange logs in /var/log/messages

My /var/log/messages contain lots of messages like this: Jan 22 05:45:05 vm kernel: hdc: drive_cmd: status=0x41 { DriveReady Error } Jan 22 05:45:05 vm kernel: hdc: drive_cmd: error=0x04 { ...
32
votes
9answers
52k views

How to automatically start and shut down VirtualBox machines?

I need to run a software system that is intended to be installed as an appliance on a dedicated machine. In order to save energy, I plan to run the system on a VirtualBox VM instead. The host is a ...
7
votes
3answers
8k views

Which *nix distro is most lightweight for running virtual machines?

EDIT: This question was expanded to include other Unix-like distros such as Hurd and BSD. Before anyone wonders, I did read related questions and answers; I think I have a sufficiently unique ...
3
votes
2answers
5k views

Unable to boot VM: Error 13: Invalid or Unsupported Executable Format

I used VMWare vConverter and everything converted fine, but when I try to boot I get an error: The physical machine boots correctly, so I don't think it is a source machine issue. I am not sure why ...
3
votes
1answer
952 views

Limit process resource consumption in CentOS 5 (2.6.18 kernel)

I would like to limit the resource (CPU, Memory, and network bandwidth) consumption of processes on the same server. And it will be good if I can migrate processes from one server to another. I ...
4
votes
1answer
5k views

CentOS doesn't know what the internet is

So I've done my share of investigating this problem... I just recently created a CentOS 6 VM on my LinuxMint box using VirtualBox. I left all the recommended values the same upon creation (8GB HDD, ...
2
votes
0answers
142 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 ...
1
vote
2answers
933 views

Red Hat Error Class Code: 49 When Attempting To Install Package

I am a Unix noob. I am currently working on a virtual machine that is running Red Hat 4.1.2-41. When I attempt to install a software package, I get the following error: ...
2
votes
1answer
351 views

Will VMX cpu flags increase the speed of virtual machine software , like VirtualBox?

On some CPUs, if I run grep vmx /proc/cpuinfo, I can see a vmx flag under the features entry. Will this feature speed up virtual machine software like VirtualBox?
1
vote
1answer
1k views

Ubuntu installed from mini-ISO under VirtualBox doesn't boot

I installed the mini ISO of Ubuntu 11.04 in VirtualBox. After unmounting the ISO image and booting, I can see only black screen for about two hours? Is it normal? What can I do with it in virtual box ...
1
vote
1answer
741 views

Windows 7/Ubuntu 11 dual boot plus VM?

I have installed Ubuntu on my Windows 7 machine, and can now happily dual-boot. What I'd like to do is retain this set-up but be able to use the same Ubuntu set-up as a virtual machine within ...
2
votes
5answers
1k views

How to determine why a machine is running slowly?

I log into a linux server (installed as a virtual machine) using a graphical ssh client (securessh). This server runs a tomcat5.5 server where nexus is installed. When I type commands or delete/copy ...
4
votes
3answers
506 views

Can libvirt check if virtual machine is fully booted? Can another tool?

I currently have small VM to do certain tests (it has multiple benefits - like testing on another distribution, Fedora 15, as well as running make distcheck without the problem of polluting /). ...
2
votes
4answers
927 views

OpenSolaris vs. Debian for Xen Hypervisor VM server

all. I've just purchased a computer that I'd like to repurpose as a lab server. It's a six-core AMD processor with 8 gigs of ram (16 gig max) and a terabyte hard drive. My idea is to hose Windows, ...
2
votes
2answers
1k views

Can I get full video capabilities in Arch Linux guest on Virtual Box?

I'm trying out arch linux on my win7 host on a VB and I have it installed just fine, the problem is that when I try to use gnome-shell it goes back to fallback mode because it detects that my video ...
1
vote
4answers
529 views

Which Distro/Virtual Machine combination is fast and stable?

For numerous good reasons (you know them best ;-) ) I am willing to switch my Notebook's OS from Windows 7 to Linux very soon. However since I am an absolute Linux beginner I am not committed to any ...
4
votes
4answers
296 views

Looking for small distro (to be installed automatically, with g++ and javac)

I'm looking for linux distro only with comand line and i need in it only g++,javac,python. I found Damn Small Linux but it dont have g++ and javac. It should have it out of the box because linux will ...
0
votes
1answer
4k views

Slow response time with Gnome shell in Virtualbox fullscreen mode

Today I installed Fedora 15 in a VBox VM to try out Gnome 3. After installing the guest extensions almost everything works fine. Except for the slow response time in fullscreen mode (HOST+F). By that ...
5
votes
1answer
3k views

LXC container network/routing issues

I have been experimenting with LXC virtualisation in order to run virtual machines on a dedicated server, but am having trouble setting up the networking properly. I am using veth bridged networking, ...
2
votes
2answers
5k views

XenServer how can I shrink the virtual drive of XenServer domU?

How can I shrink the virtual drive of XenServer image?. I gave 300Gb of space for one image (domU) and that was mistake. Now I want to shrink it. How can I do that? The system is already set up and ...
1
vote
1answer
238 views

KVM guest machine graphics problem

I'm new to KVM. I use the following way to create and start a guest KVM machine. qemu-img create -f raw centos.img 100G /usr/libexec/qemu-kvm -hda ./centos.img -cdrom /usr/local/CentOS_5.6_Final.iso ...
6
votes
1answer
3k views

Xen on openSUSE 11.4

I have done a few installs of openSUSE to use as a Xen dom0 and have not got it working yet. These are the steps I followed: Installed openSUSE 11.4 from Live KDE CD. Installed all updates via ...
6
votes
1answer
3k views

Linux - LXC; deploying images with tiniest possible X11

is it currently possible to setup LXC containers with X11 capabilities? I'm looking forward for the lightest available X11 container (memory-wise), hardware acceleration a plus but not essential. If ...
7
votes
2answers
20k views

CentOS on HyperV - eth0 not in ifconfig?

I've launched a CentOS install in HyperV and assigned a NIC the same way I've done on an Ubuntu VM, however, the device simply isn't picked up. Only my loopback is found by ifconfig. How should I go ...
5
votes
1answer
4k views

What are some alternatives to virtualbox

I have a lot of trouble lately installing on a box that i can't reboot or change the kernel. Is there any other package that supports gre tunnels (if the os supports ) that i can run on linux? ...
2
votes
3answers
257 views

Running Linux virtual machine guest on Linux Host

I have a machine running Debian Linux (stable), but I'd also like a Debian unstable box to use as a sandbox to test and develop. Is there an easy way to create a virtualized Debian unstable machine on ...
2
votes
2answers
892 views

Virtualization solutions under OpenBSD

I use "OpenBSD as my Desktop OS". What are my choices to run a Linux Distribution, or a Windows (XP/7) in a Virtual Machine? I know that the following apps are not available for OBSD: VirtualBox ...