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Simulate a computer: why do I need a virtual machine? (Topic)

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Simulate a computer: why do I need a virtual machine?

Virtual Machine (VM) is a special program capable of creating another OS inside the operating system, isolated from the main OS by software. To mount a virtual image, you need to allocate some of the physical resources for creating virtual components.

Interaction with physical hardware

Like a normal computer, a virtual machine needs its own customizable pseudo-components that imitate real hardware - a processor, RAM, video card, hard drive, etc. with the prefix "virtual".

Despite using the physical hardware VM, it does not have absolute access to external system resources. Any critical error only harms the internal system, the real OS does not suffer from this.

Interaction with the real system

The simulation environment works like a regular program and has a familiar windowed interface. Interaction with the internal system takes place using a mouse and keyboard. To exchange files with a real OS, normal drag and drop works. With customized keyboard shortcuts, you can easily switch between the two systems.

Practical Application

Alternatively, a VM is suitable for using multiple virtual servers on one physical computer. Often, a virtual machine is used to detect spyware, viruses, and vulnerabilities in programs downloaded from unverified sources. VM is needed for testing the next builds of operating systems (identifying bugs and shortcomings). It can also be used to safely surf the Internet: infected files do not get outside the shell.

The Topic of Article: Simulate a computer: why do I need a virtual machine?.
Author: Jake Pinkman


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