VMs

A virtual machine (VM) is a computer file that acts like a real computer. Often called an image, it can run in a window, creating a separate computing environment. This setup allows you to use a different operating system or even make it your main computer experience, which is common for many work computers. VMs let you run multiple operating systems without messing with the host OS.

Virtual machines create safe environments where you can test applications or explore security vulnerabilities without risking your main computer. There are two main types of virtual machines such as process VMs and system VMs. A process VM runs a single application on a host machine, providing a programming environment that works regardless of the underlying hardware or OS. System VMs, on the other hand, simulate a complete computer system, allowing you to run different operating systems at the same time from the same hardware. 

Without virtualization, running systems like Windows and Linux would need two separate physical machines, which isn’t practical. Vagrant and Amazon WorkSpaces are two renowned types of virtual machines. Vagrant is an open-source tool that allows developers to create and manage lightweight, reproducible development environments using virtual machines. Amazon WorkSpaces is a cloud-based service that provides fully managed, secure desktop experiences, allowing users to access their desktops from anywhere using various devices. Each has its strengths, but many users find Vagrant particularly useful for creating and managing development environments. Hence, virtual machines make it easy to experiment and learn without the usual risks associated with software testing.

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