Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [virtual-machines]

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.

Modern virtual machines are implemented with either software emulation or hardware virtualization. In most cases, both are implemented together. Usually the term refers to system virtual machines which provide a complete system platform which supports the execution of a complete operating system (OS). Note that process virtual machine exist too, which are designed to run a single program (a single process).

An essential characteristic of a virtual machine is that the software running inside is limited to the resources and abstractions provided by the virtual machine—it cannot break out of its virtual environment.

2821 questions
7
votes
3 answers

Export VM from Proxmox

I want to export the vm from proxmox to virtualbox or vmware. Is it possible? and how?
hotips
  • 533
  • 4
  • 8
  • 19
7
votes
4 answers

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 performance was better than XP and Vista. I…
Click Ok
  • 956
  • 4
  • 12
  • 18
7
votes
6 answers

Best way to "virtualize" existing system?

I have a fully patched, pristine Windows XP box and would like to create virtual machines that have the exact same setup, OS and software - just differ in disk size, available RAM. The virtual technology does not matter (VMWare, VirtualPC, other),…
user7673
7
votes
2 answers

Does a VM eat up RAM even when the VM is not active?

I'm running a virtual machine on my windows OS at work, and i have dedicated 1.5 gigs of ram to it, but i'm wondering: is that ram lost to my windows OS even when i'm not running the virtual machine?
Robert
7
votes
3 answers

All sub-domains to one IP in hosts file?

I've got a VirtualBox VM running with host-only networking. This VM is running Apache, and I want to setup a bunch of name-based virtual hosts in it that can be accessed from the web browser on the host machine. The thing is, every time I add a new…
Apreche
  • 1,405
  • 5
  • 17
  • 20
7
votes
13 answers

Suggestion for a simple LDAP server and client

Trying to set up a headless LDAP server on a linux virtual machine (vmware). Small scope, but needs to be reliable and easy to use. Strong preference for simplicity over features, command-line over gui. What are some of the good options? Also need…
sangretu
  • 372
  • 1
  • 2
  • 8
6
votes
2 answers

What if I store 10TB on azure servers and then keep the vm powered off?

I want to know should I pay for storage on azure even if I don't use it? for example if I store 10TB on an azure VM and then keep that VM powered off, Will Microsoft charge me for that 10TB data? Or it just charges us for powered on VMs?
user1728307
  • 79
  • 2
  • 6
6
votes
1 answer

dircolors: no SHELL environment variable, and no shell type option given

On interactive login I get: dircolors: no SHELL environment variable, and no shell type option given But I do have SHELL variable set: % set | grep…
LetMeSOThat4U
  • 1,371
  • 2
  • 17
  • 35
6
votes
2 answers

VM CPU usage at 100%

CPU usage on our metrics box is at 100% intermittently causing: 'Internal server error' when rendering Grafana dashboards The only application running on our machine is Docker with 3 subcontainers cadvisor graphite grafana Machine spec OS…
gpullen
  • 61
  • 5
6
votes
2 answers

Causes of RTP jitter at the server

Investigating some call quality issues (0.5 – 1 second dead spots in calls) I took a packet capture of a phone call between two extensions on the same PBX. Since I was capturing from the PBX, I was rather surprised to see Wireshark reporting a huge…
miken32
  • 942
  • 1
  • 13
  • 35
6
votes
2 answers

Alternative way to deploy Azure VM from generalised image with AzureRM

I am wondering in what way should I spin-up windows VM for Azure from generalized image, in order to add custom settings (from what I know it's impossible to customise the VM which was deployed from Azure market place) That would be great if you…
fopsik
  • 606
  • 3
  • 9
6
votes
4 answers

How to migrate a bare metal Linux installation to a virtual machine

I'd like to migrate a RHEL5 installation from a bare-metal installation to a virtual machine. I'm not very experienced when it comes to Linux backup and restore procedures, so I'm looking for advice on the best way to accomplish this. The…
user26577
6
votes
2 answers

copy live vmdk disk

Fairly new with vmware. We need to copy 2 vmdk files from the data store to a USB storage (Mounted on a VM on the host in question). The vmdk files are not the vmdks on which the OS resides; they simply make up a spanned volume on a windows 2003…
joebegborg07
  • 869
  • 5
  • 16
  • 24
6
votes
1 answer

How can I increase the throughput/bandwith of my virtual network?

I have some virtual machines servers with some micro-services and do some load tests with JMeter. All the servers including the JMeter machine are sharing the same virtual network. The virtual network has no adapters: The problem is that it seems…
Eduard Florinescu
  • 851
  • 5
  • 24
  • 39
6
votes
2 answers

What is the difference between containers and virtual machines?

I want to comprehend all that differ a container from a virtual machine. A filesystem with all operational system can be observed for both of these virtualization methods. But in a Docker container, e.g. centos 5.x, if I exec uname -a in container's…
Thiago Rider Augusto
  • 695
  • 1
  • 8
  • 18
1 2 3
…
99 100