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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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Mounting VirtualBox shared folders inside a docker container

I have a VirtualBox Guest OS running Ubuntu Server 17.04 which has docker-ce installed. I have some shared folders that are mounted inside the Guest OS but when I pass them to the docker container with a --volume command I can't see any content…
Kunal
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Debugging userland program (full of anti debug) through VMWare

I am currently trying to reverse a program under Linux that has a bunch of anti-debug tricks. I was able to defeat some of them, but I am still fighting against the remaining ones. Sadly since I am mediocre, it is taking me more time than expected.…
I am ttt
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Increasing Requests/Second Python Google Maps Geocoder

I am having difficulty increasing the amount of requests I can make per second with Google Maps Geocoder. I am using a paid account (at $.50/1000 requests), so according to the Google Geocoder API I should be able to make up to 50 requests per…
user6068326
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What is indirect buffer and indirect descriptor?

Recently I'm reading virtio code in linux kernel. I came across "indirect buffer" and "indirect descriptor" in the source code. I wonder what is the meaning of "indirect"?
4va1anch3
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Apache activemq and iscsi

We are planning to use the iscsi target to handle the Activemq master/slave setup. In this case we will mount a SAN storage volume on two virtual machines using the iscsi protocol and those two VMs would share the same mount (from SAN). So the…
Computergeek
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Terraform - Azure Windows VM connection issue

I created a resource group with all required resources for a Windows Server VM. Here is the script: #Variables variable "rsg" { default = "EXTEDO_US_EASTUS" } variable "location" { default = "East US" } variable "hostname" { default =…
Keith Wallace
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How are operating system containers different from virtual machines?

Everywhere I can see is how Docker can be different from virtual machine but nowhere there is a answer on how basic OS containers are different from virtual machine. If we consider the basics, it looks like both are same i.e. an operating system is…
Nikhil Agrawal
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How to import a standard VM into a devtest lab

I have created and configured a VM in Azure. I would like to use the image created from that VM in a devtest lab. However, I see that images in devtest labs can only be created from VHD disk. Is it possible to transform a normal Azure image into a…
nicolamarangoni
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I cannot reach php built-in server running on a VM

I have a too basic php application that I wante to run through the built-in php server and that lives in my VM in my windows machine:
smarber
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WinRM Listener Resets on Startup

I have an Azure VM running Windows Server 2016 (64-bit, 14393.1593). It has some WinRM listeners on it, one for HTTP and one for HTTPS. When I restart the machine, the HTTPS listener resets itself to an old configuration (hostname and thumbprint). …
srbrills
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persistent installerror with virtualbox

have an persistent issue, that i cant get off. I´m trying to install virtualbox on Windows10, and something in the system dont let me... From BEGIN: I am new in Virtual Machine. so i installed first vmware Player, to work with and then virtualbox.…
Wollhaar
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Do I have to exit ssh and perform 'vagrant reload' to see the changes I've made in my project's views files?

I'm using CentOS 7 with Vagrant to work on my rails application and I was under the impression that I could just CTRL + c to restart my rails server and see any changes I've made to the view, but it looks like I have to exit the vm and 'vagrant…
Zestyyy
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No display with message:"Guest has not initialized the display (yet)." when I try to run Android on qemu

I just try to run android on qemu. I work on an Ubuntu 16.04 with Intel(R) Core(TM) i7-4790 CPU. I sync and compile android-6.0.1_r1 into aosp_arm-eng. I sync and compile qemu 2.9.91 with arm platform. Then, I try to do my job by the following…
Yieux
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Segfault on calling a function in C

So I'm building a virtual machine, and trying to make it as cross platform as possible, and suddenly encountering a strange error. There is a let instruction for my machine, which allocates memory for a variable in the memory of the machine and…
Subhranil
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invoking hypercall in qemu-kvm without guest kernel modification

I want a user process in guest machine call a custom hypercall and qemu receives it. I don't want to make any modification of a guest kernel. From this answer and other materials, I know that vmcall instruction will cause VMEXIT and VMM will receive…
Dae R. Jeong
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