A virtual machine (VM) is a software-based emulation of a physical computer that runs an operating system and applications. It allows users to run multiple operating systems on a single physical machine, providing flexibility and efficiency in managing resources.
VMs are commonly used for testing software, developing applications, running multiple operating systems on a single machine, and creating isolated environments for security purposes. They can be easily deployed and managed, and can be quickly scaled up or down based on the needs of the user.
There are different types of virtual machines, such as full virtualization, para-virtualization, and container-based virtualization. Each type has its own advantages and use cases, depending on the specific needs of the user.
Overall, virtual machines provide a cost-effective and efficient way to utilize hardware resources, improve flexibility and scalability, and enhance security by isolating environments and applications.