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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Windows 7 Dual Boot + Virtualization under Ubuntu 10.04?
Question: I currently have a dual boot: Win 7 x64 Pro & Ubuntu 10.04.1 x64. Is there a way to boot Win 7 as a virtual machine under Ubuntu without reinstalling anything, in addition to ...
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3answers
260 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 ...
2
votes
3answers
205 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
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2answers
398 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
...
2
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2answers
6k 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 ...
2
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3answers
335 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
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2answers
545 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 { ...
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2answers
56 views
Can I have a bridged interface without an IP?
I have 2 NICs: eth0 & eth1 on a host OS which runs some VMs (LXC) under it.
The hosts eth0 is connected to a private network and configured as the primary interface.
The hosts eth1 is connected ...
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1answer
219 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
423 views
How to access a KVM virtual-machine?
I've created a KVM VM using virt-install. There is an image file in the directory /ssd/kvms.
How do I access the virtual machine and turn it on? Do I need to assign an IP address, and if so, how do I ...
2
votes
1answer
176 views
Make box only communicate on lan only?
I am running a VM with Debian as the guest OS (I can choose another distro). It has nginx running along with some other software.
Some of the software tries to make outgoing connections (for example ...
2
votes
1answer
291 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 ...
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2answers
3k 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 ...
2
votes
1answer
188 views
Everything works except Fedora
I'm taking an Operating Systems class online for college. It requires us to have a copy of Fedora 13, provided by our instructor, running on a virtual machine. On my machine, it boots to a message ...
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1answer
569 views
Fastest remote X from Windows
I have the following set up:
|-----------------| |---------------|
| Windows | LAN (or VPN) | Linux box |
| (local machine) | ...
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2answers
1k 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 ...
2
votes
1answer
267 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?
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4answers
523 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 ...
2
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1answer
111 views
How to get past “Loading Initial Ramdisk” hang after going from x86_64 to i686 cpu
Long story short, I have a Ubuntu 12.04 64-Bit Server setup as a virtual machine with VirtualBox (4.1.18). I migrated the guest machine from an AMD chipset (a gaming machine) to an Intel Xeon (server ...
2
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2answers
69 views
Install the same 64-bit packages as a 32-bit Xubuntu installation
I have been using a virtual machine (Xubuntu 12.10, with VMWare on a windows host) for all my programming work, which I am trying to transition from a 32-bit install to a 64-bit install. I am hoping ...
2
votes
1answer
549 views
VBoxManage: Error: Can't be used as the requested device
I used the soluton from this thread but always i get
VirtualBox error: The medium 'lvol.vmdk' can't be used as the requested device type (0x80004005)
I've tried all controllers SATA, SCSI, IDE and ...
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1answer
1k 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
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1answer
195 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 ...
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1answer
674 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 ...
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0answers
603 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
122 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 ...
2
votes
1answer
680 views
Using mplayer inside kvm/qemu
Is it possible to use mplayer inside kvm/qemu configuration?
What video driver should I use?
The only driver that worked was sdl and it was super slow.
EDIT: I just found out that VirtualBox works ...
2
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0answers
261 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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2answers
482 views
Attach terminal to X desktop running in VM
At home I'm setting up a CentOS 5.5 server that will be running a bunch of KVM VMs. Normally pressing the CTRL-SHIFT-Fn combination on the attached keyboard switches to terminals on the host machine. ...
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vote
2answers
350 views
good Ubuntu/Debian distro for a development/coding VM?
I have a Windows laptop, but I like to use Linux as a development/coding environment. Currently I am currently running Ubuntu 12.04 as a guest OS with VirtualBox. Some of the issues with this setup ...
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2answers
570 views
Communicate between Ubuntu VM and Windows host
I'm running an Ubuntu VM on a Windows 7 host. I have two questions:
I think that on Windows, localhost is a loopback address, and sending packets to it doesn't actually transmit any data on the ...
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3answers
318 views
Linux as virtualisation host and client performance under Core i7?
(to skip the details, jump to last paragraph)
A few months ago I built what I thought was a beefed up box with an AMD Phenom II X4 955, 8 GB DDR3 1333 mHz RAM plus a nice motherboard (can't remember ...
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2answers
441 views
Why does dhclient fail with my ISP's DHCP server on a virtual interface?
Recently I switched from a T1 to a residential cable service (Comcast). I have a virtual machine (XenServer 5.6) running Debian 6.0.6 that is acting as the default gateway for my home network, but for ...
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1answer
985 views
What is the difference between virbr# and vnet#?
I am running KVM on RHEL6, and I have created several virtual machines in it. Issuing ifconfig command to the host system command line shows a list of virbr0, virbr1... and vnet0, vnet2... Are they ...
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2answers
76 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 ...
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1answer
86 views
How to boot a system in a second HD but runing the system in another one?
I have two computers, but the old one is not working well. So I'd like to install the old hard disk on the new computer.
I know how to do this and I know how to access the data from sdb. But I have ...
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2answers
1k views
Fix fstab to prevent boot failure
How can I fix fstab to prevent boot failure?
It seems that I have added incorrect record to /etc/fstab:
//servername/share /mnt/share cifs defaults,username=myuser 0 0
When I did ...
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2answers
2k 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? ...
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1answer
2k views
CentOS doesnt know what the internet is
So I have done my share of investigating this problem...
I just recently created an CentOS 6 VM on my LinuxMint box using VirtualBox. I left all the recommended values the same upon creation (8GB ...
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1answer
388 views
How to create a “jailed” environment for an application under Linux?
Using Ubuntu 11.04 as a Desktop OS, I want to reach "bigger security" with a "jailing" processes:
VirtualBox, Google Chrome, Firefox, VLC, PDF/djvu reader, MP3 player, wine, pidgin, transmission, ...
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2answers
527 views
Virtualbox, mounting guest directory on host computer
Is there a way to mount a directory residing on my VB guest (linux) on my host (linux)? I know I can do it the other way around with the shared folders feature on Virtualbox, but is there a way to do ...
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2answers
504 views
Clustering Servers to run one vm
I am looking at clustering about five machines and I wanted to get some opinions about what is the best way to go about it. I'm wanting to run one VM over the five machines, firstly I want to ask,
1: ...
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1answer
1k views
Configuring the display properties on openSuse (Gnome) running as VirtualBox VM
I just created a VM using Suse Studio and I built just a simple openSUSE 11.3 VM based on the gnome template. I have not added any other software (except for Firefox and the Kernel modules, to be able ...
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1answer
67 views
How to use a backup in OpenVZ
I have a backup (.tgz file) that is an openvz virtual machine. i followed this article and i setup an openvz container but how i will use my backup file?
EDIT:
i found the tool ovz-web-panel (i am ...
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2answers
656 views
Why doesn't eth0 get an ip address when set up in a bridge?
I'm trying to understand how dhcp for IPv4 is used with bridging.
eth0 is configured to be in br0. This is working just fine but only br0 gets a dhcp lease, while eth0 doesn't. Both are configured ...
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2answers
417 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 ...
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2answers
431 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:
...
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1answer
644 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 ...
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1answer
147 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 ...
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1answer
792 views
Guide to installing Xen on CentOS 5.9 (That is still valid)
I need an idiots guide to installing Xen Hypervisor on CentOS 5.9
We attempted to install it on 6.3 before, but completely failed, so we reverted to 5.9 to see if we had more luck. We had issues ...
