A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system. It is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine.

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How do I know if I'm working on a Virtual Machine or not?

Is there a way to know if the Windows machine I'm working on is virtual or physical? (I'm connecting with RDP to the machine. If it's a virtual machine it is working and handled by VMWare).
16
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12answers
19k views

Is it possible to setup a virtual machine inside another virtual machine

I have been playing with virtual machines latley, and wondered if I could run a virtual machine inside a virtual machine? Is it possible? Is it practical?
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3answers
1k views

running Samba Active Directory Server on Windows desktop (for developing)

Huh, I completely confused by others editing my post... breaking all system of referencing and linking into a mess... Bifurcating the question (1) Can anybody share experience and/or links on ...
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9answers
89k views

Creating a virtual machine in VirtualBox from a physical one

Is there any way to create a virtual machine that you can use in VirtualBox from a physical installation that you have? For instance, if I have Windows XP installed on a physical computer and want to ...
5
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4answers
2k views

Is it necessary to have RAID in a virtual machine?

I have a Windows 2008 Enterprise on RAID 10 running Active Directory, Hosted Exchange, and a web server on HyperV VMs. Do I need a virtual RAID for Exchange? If so, why? Edit: thanks everyone for the ...
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4answers
21k views

What range of MAC addresses can I safely use for my virtual machines?

I want to assign my virtual machines MAC addresses so that I can configure DHCP reservations for them so that they always get the same IP address regardless of which host hypervisor they are running ...
5
votes
1answer
511 views

Maximizing throughput of virtual file systems

I've been using a QEMU system to build software. The problem I've been having is that the system seems to suffer from extremely slow disk access. This is not necessarily a problem as it's not really a ...
2
votes
1answer
341 views

How can I use perfmon/logman to set up logging on a master (Windows) VM, writing to another machine on the network?

I know how to set up logging to write to a remote location in the general case - just specify the output filename using the full UNC path (e.g. \\HOST-PC\directory\logoutput.etl) when creating the log ...
1
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2answers
67 views

How does a hosting company change a file on a vserver without logging in?

In my virtual server, ssh is not on port 22, I don't allow login with passwords, and I don't allow root logins. Recently, the server was not responding. My hosting company told me that my Apache ...
1
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0answers
45 views

Needing to upgrade server solution, not sure which direction to go [duplicate]

Possible Duplicate: Can you help me with my capacity planning? On "Black Friday" our web server took on more load than it could handle. We are currently looking into upgrading, but I am ...
1
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2answers
2k views

Server 2008 DC rejecting replication requests

Have a DC that has recently been part of a business continuity test. From what I understand the server (which is virtual) was snapshotted, test carried out while the link between the two sites was ...
13
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8answers
18k views

Sync LVM snapshots to backup server

I have a number of Xen virtual machines running on a number of Linux servers. These VMs store their disk images in Linux LVM volumes with device names along the lines of /dev/xenVG/SERVER001OS and so ...
20
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17answers
2k views

Virtualization Pitfalls/Lessons Learned

What are some pitfalls or lessons learned after converting existing hardware to a virtualized environment? Is there anything you tried to virtualize but will never do again?
11
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5answers
1k views

Renting a dedicated, but getting a VPS. How to detect? [duplicate]

When renting a dedicated server, how can one be certain than he/she is not getting a VPS or some other virtual machine variant instead of a true dedicated hardware box? Which checks can be run ...
24
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4answers
704 views

Will virtualizing a server mean another OS layer to patch and update, more work and greater risk?

I've done a search and have not found anything addressing issues regarding patching and system updates. I've got guidelines that say servers need to have necessary patches. If I have a VM host then ...
5
votes
2answers
5k views

How do I change the size of a VHD?

I have a fixed size virtual hard drive that is running out of space. What's a good way to go about increasing the size? This VHD is created from Microsoft Virtual PC and/or Microsoft Virtual Server.
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votes
4answers
1k views

Which RAID Level Should We Run For Virtual Machine Storage

We just ordered a server which we are going to use as storage for our virtual machine environment. Basically it will work as a block level storage device running iSCSI to each hypervisor. The server ...
2
votes
3answers
2k views

How to run OS X (Leopard or Tiger) in Windows?

Is there a way to run Mac OS X (Leopard or Tiger) in Windows on a virtual machine? I have 2 GB of RAM and a 2 GHz processor. My processor is an 32-bit AMD, but I don't think this will matter because ...
1
vote
1answer
581 views

How to make this multiplayer flash game publicly available? [closed]

I have made a ActionScript 3.0 Flash game and implemented multiplayer functionality using SmartFoxServer. Now I want to put this game on my website which is hosted on 000webhost. My game works ...
11
votes
6answers
28k views

Can I run 64-bit VM guests on a 32-bit host?

Can I run 64-bit VM guests on a 32-bit host? If I have a physical PC with 32 bit can I launch a VM that is 64 bit? What virtual machine software (Virtual PC or VirtualBox or other) would allow this? ...
9
votes
11answers
4k views

Any way to run Linux as a Virtual Machine on top of Windows so can have best of both worlds?

Since Linux has a lot of useful tools, while Windows has a lot of apps (like Chrome), instead of buying another machine to run Linux, is there a way to run it as a Virtual Machine on the PC? The ...
3
votes
5answers
11k views

How do I boot a virtual machine image from my network?

I have many machines which require the same configurations. My goal is to boot them all from the network and load a virtual machine. It would be wonderful to have one image for all of our customer ...
2
votes
1answer
12k views

How to change a VM from split across multiple .vmdk files to a single one or two?

I have a VM with 3 partitions. One main one, one for swap space, one for storage. However, there are dozens of .vmdk files. Some of those .vmdk files are very large (over 1 GB), but the majority ...
1
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2answers
164 views

Using rsync and which directories should I place in my exclude file when using rsync?

I would like to use a CentOS VM for a mirrored full backup of my CentOS mail server. Both are the same version and are up-to-date. I have found that without excluding certain directories the VM backup ...
10
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2answers
1k views

understanding relationship between Qemu and KVM

What is the difference between KVM and Qemu? As I understand, latter is able to provide "user mode emulation" which means that one can run a single executable built for some other architecture like ...
5
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7answers
652 views

Make a copy running VM-ware Virtual Machines

I want to backup my virtual machines while they are running, is it possible to do this without buying more VM-Ware products? They are running on CentOS 5.2.
2
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2answers
3k views

How to make a DHCP server on virtual machine serves other virtual machines(on different physical machines)?

I'm building a virtual cluster with VirtualBox and Opensuse. I have 10 physical machines and need several vms on each. The virtual machines are supposed to be in a "private" network, but still have ...
2
votes
2answers
296 views

How can I automatically create/control VMs using vsphere?

Is it possible to automatically create virtual machines using vSphere / ESXi? How would I go about doing that? I have a script to automatically create + install windows on a VM using VirtualBox. It ...
1
vote
2answers
1k views

Low entropy on CentOS 5 after new mount

I recently mounted a new partition and moved /home and /var/lib/mysql to the new drive and did a symlink to them. Now I've noticed that the entropy (using munin) has dropped from around 3000 to ...
1
vote
3answers
988 views

Can a virtual PC find out the identity of its host?

There's a Microsoft Virtual PC instance on my network that runs build scripts and reports problems by sending me an e-mail. I don't what machine it's running on! I can access the machine by Remote ...
18
votes
5answers
1k views

Is there a way to have a virtual machine only have one core yet use three cores on the host machine? [duplicate]

Possible Duplicate: Can a single Virtual Core on a VM use more then 1 physical core? I'm a co-owner of a Minecraft server that is getting rather large each day, but as we get bigger we're ...
5
votes
4answers
3k views

How to enable multiple virtual consoles on linux?

I'm new to linux so I have no clue how to do this (couldn't find it on the web). I'm running a LAMP Virtual Machine and when I press ALT-F2, F3 etc.. to use a Virtual Console I get a blank screen (all ...
4
votes
4answers
7k views

Virtual Machine guest optimization tips

I've installed Windows7 in VirtualBox 2.2.4 and worked like a charm. But compared with my WindowsXP virtual machine, the performance is slow. I've installed Windows7 in (non-virtual) machines and the ...
3
votes
1answer
5k views

Why are virtual machines on vSphere 5.0 suddenly suspended?

We just got our vSphere 5.0 and vCenter Server 5.0 configuration working with several VMS. These are the vms. Jenkins appliance. vCenter Server Appliance Windows7x64 Windows7x64-1 Windows7x64-2 ...
3
votes
4answers
2k views

How to distribute a virtual machine to allow users to try out a dependency-heavy program?

I have written a piece of academic software that has many third-party software dependencies (and requires a RDBMS). I would like to create set up a Linux virtual machine image preloaded with all the ...
3
votes
3answers
3k views

Disable Time Synchronization on Ubuntu

I am setting up a development environment with Ubuntu in a virtual machine. The date in the VM must be in 2009 due to some silly timebombing issues, so I want to disable any automatic time ...
2
votes
2answers
892 views

Can I add a second network adapter to my Azure VM?

I have Multiple VM's on Windows Azure. Default, they come with 1 network adapter and you can only assign 1 virtual network (Availability Set) My question is : possible to connect 1 VM to more then 1 ...
2
votes
1answer
579 views

Why are eth0 and vmbr0 (bridge) having the same MAC addresses?

I configured my Debian (with KVM on board) as following: /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet manual auto vmbr0 iface vmbr0 inet static address ...
2
votes
1answer
669 views

VM Freezes at the end of a backup

I have a virtual machine that I'm backup up using Veeam Backup & Replication 6.5. The software is working well, but one issue I'm having is that at the end of the backup (99%) the machine will ...
2
votes
2answers
559 views

Virtualizing Firewalls/UTM

So Sophos UTM (Astaro Gateway UTM) can be virtualized in Hyper-V, VMWare, vSphere etc. Now I'm new to virtualization, so am wondering how the networking would be configured in this situation. ...
2
votes
2answers
294 views

typeperf.exe Intermittently Returning -1

Edit: Sep. 26 2012 - I am updating this question and its tags because I have now encountered this error again, on a Server 2k8R2 VM. Still, there seems to be no authoritative information out there on ...
2
votes
2answers
106 views

Manage Hyper-V Server 2008 R2 from same machine

Is there a way to manage Windows Hyper-V Server 2008 R2 from within itself? E.g. not remotely. I'd like to be able to manage VMs as well as connect to and work with a a VM in full screen mode. This ...
2
votes
2answers
3k views

Python simple http server and virtual machines - can't connect. Ip changed?

I sometimes use python -m SimpleHTTPServer one liner to serve files from my vms for download to my host. Today i tried to use it inside virtualbox vm that is under NAT network settings - i typed this ...
2
votes
6answers
6k views

How to improve Hyper-V performance

I have a windows 2008 (RC2) server running Hyper-V with all of my company's virtual machines. Most of the machines are used to run Continues integration and test environment. Although each machine ...
1
vote
3answers
399 views

Securing a guest VM to give it internet access, but block access to host LAN

I have a Linux guest VM running under a Windows host. If I set the networking mode to NAT, the guest can get internet access (which I want), but can also access the hosts LAN (which I dont). For ...
1
vote
1answer
671 views

Setting up mongodb via upstart - how to pass options?

I installed MongoDB in an Ubuntu Server VM inside VMware using these instructions: http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/. Everything works fine, and I can access MongoDB ...
1
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6answers
958 views

Will the OS crash if the system partition can't be access for a short period?

An operating system is installed in a virtual machine environment, such as VMWare or KVM. A network shared disk volume (e.g., iSCSI disk) is used as the OS system partition. Heavy traffic is running ...
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1answer
159 views

netkit: why cant my router 4 pc4 ping my router 1 pc1 - how can I solve this please?

Below I have four routers connected but my pc1 on r1 cannot ping my pc4 on r4 and also my pc2 on r2 cant ping my pc4 on r4 and vice versa. Below is a network diagram: and the configurations are below ...
1
vote
5answers
915 views

unable to rename linux hostname?

I got one problem with my linux webserver where I deployed from Virtual Machine template, usually i go to the console and then issue the command hostname NEWSERVERNAME to make it happens and then ...
1
vote
2answers
238 views

Is the # of CPUs on a virtual machine always meaningful?

On a virtual machine, if cat /proc/cpuinfo tells me that there are 4 CPUs, is this just as meaningful as if it were bare metal? Should I configure my server (for example, # of Nginx or Apache workers) ...