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Questions tagged [virtual-machine]

A virtual-machine is software emulating complete computer hardware. There are various applications that supply this functionality. **Note**: For questions on the Java VM, use the specific tag [jvm], and for the Android virtual machine, use the tag [dalvik]. For other questions on implementation details of other kinds of VMs like interpreters, automata or Turing-machines, use the tag [vm-implementation]. ONLY QUESTIONS ABOUT PROGRAMMING ARE ON-TOPIC.

If you need non-programming help setting up a virtual machine, ask those questions on Server Fault or Super User.

A virtual-machine is software emulating complete computer hardware. There are various applications that supply this functionality.

The term virtual-machine can be used for a single file containing the software which emulates all the hardware. Virtual-machine software use various hardware and software tricks to speed up the running software.

Programs run on a real machine do not need to be changed to be run on a virtual machine. A program running on a virtual machine works exactly the same as if it were running on its own hardware.

Some virtual machine software include:

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Docker won't start on Windows: Not Enough memory to start docker

I am trying to get started with Docker on Windows. My machine has 4GB of RAM and a 1.9GHz - 2.5GHz Intel i5 processor, running Windows 10 Pro x64. I know these aren't powerful specs, but I would have thought I should be able to run Docker? However,…
George Edwards
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VM has become 'inaccessible' - Vagrant no longer working

For some reason this morning when I run 'vagrant up' I get the following error (this has worked absolutely fine for over a year) Your VM has become "inaccessible". Unfortunately, this is a critical error with VirtualBox that Vagrant can not cleanly…
Zabs
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Is there a virt-manager alternative for Mac OS X?

It is common that programmers will need to interface with virtual-machines in their day-to-day workflows, and one popular way of doing so on Linux and Windows systems is with virt-manager. Is their a way to get virt-manager or a similar alternative…
Happynoff
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Vagrant " VM not created." when trying to create box from existing VM

I imported the precise32 box, then installed some packages and other data on the VM. My plan is to then repackage it into a box, to save on complicated provisioning when sharing. However. vagrant package --base dev-vm --output /box/vm.box Always…
Kiksy
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Is it possible to develop iOS apps with Flutter on a Linux virtual machine?

I am new to developing mobile apps and wanted to try Flutter but I use Windows. Because Flutter doesn't support Windows yet I had the idea to use a virtual machine running Linux to install Flutter. Does this work? Also in the Flutter setup it says…
philipp
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Gitlab with non-standard SSH port (on VM with Iptable forwarding)

My gitlab is on a virtual machine on a host server. I reach the VM with a non-standard SSH port (i.e. 766) which an iptable rule then forward from host:766 to vm:22. So when I create a new repo, the instruction to add a remote provide a mal-formed…
Édouard Lopez
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Can't start my virtual Box machine after installing Docker on Windows

To learn ArchLinux, I installed and using ArchLinux in a VirtualBox machine. It runs perfectly. Now I installed Docker on my pc (Windows environment). During the installation of Docker I got a warning, that if I install Docker on Windows, that…
Blank
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Docker + Virtual Box = VT-x is not available (VERR_VMX_NO_VMX)

I installed docker. During installation, it complained that you can't have two virtualization environments, and that it would make docker the primary one. I said: "OK." Now, I need to go back to enabling virtualbox. I uninstalled Docker, hoping it…
DrDamnit
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How do I package an existing VM that was not created using vagrant up command?

I installed a VirtualBox and then installed a Ubuntu 12.10 Server Base OS in it. I have installed all kinds of php packages and other packages in it. My friends recommended me to use Vagrant so I can share my setup with my team mates easily. Because…
Kim Stacks
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What is the difference between Docker Host and Container

I started learning about Docker. But I keep getting confused often, even though I read it in multiple places. Docker Host and Docker Container. Docker Engine is the base Engine that handles the containers. Docker Containers sit on top of Docker…
Kevin Rave
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What exactly do shadow page tables (for VMMs) do?

My understanding is that shadow page tables eliminate the need to emulate physical memory inside of the VM. ie. Instead of: guest OS -> VMM + virtual physical memory -> host OS -> host hardware It's just: guest OS -> VMM -> host OS -> host…
aerain
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Rename Google Compute Engine VM Instance

How do I rename a Google Compute Engine VM instance? I created a new LAMP server and I'd like to rename it in the "VM Instances" dashboard. I've tried renaming the Custom metadata, but that didn't seem to replicate to the dashboard.
mickeylieu
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Vagrant cannot forward the specified ports on this VM

I have Vagrant in use for one box profile. Now I want to use Vagrant for another box (b2), but it says that bioiq's instance is consuming the forwarded port 2222 (which it is). Now, if I configure b2 with the below, Vagrant still tries to use…
Nutritioustim
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Unable to connect to Vagrant private network from host

I have a vagrant virtual box up and running. So far I have been unable to connect to the web server. here is the start up: [jesse@Athens VVV-1.1]$ vagrant up Bringing machine 'default' up with 'virtualbox' provider... ==> default: Clearing any…
laertiades
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Geny motion failed to import OVA

Suddenly, i lost all Geny motion emulators (maybe after upgrading to Geny motion 2.2, not sure) and when ever i download a new virtual machine or emulator i get the "failed to import OVA" error and i can't use the virtual machines i downloaded at…
user2469133
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