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A virtual machine (VM) is a software-based emulation of a physical computer that can run operating systems and applications just like a physical machine. Virtual machines are typically created using virtualization software, which allows multiple VMs to run on the same physical hardware. This allows for greater flexibility and efficiency in managing and utilizing computing resources.
Virtual machines are commonly used for a variety of purposes, including software development and testing, server consolidation, and disaster recovery. They can also be used to run multiple operating systems on a single physical machine, allowing users to switch between different environments without the need for separate hardware.
Overall, virtual machines provide a cost-effective and efficient way to utilize computing resources, improve system flexibility, and enhance overall system reliability and security.