QEMU

QEMU is an open-source software that allows one computer to run multiple virtual machines (VMs), each with its own operating system and applications. Think of it as a flexible platform that creates simulated computers within your real computer. This enables you to test different OSes, run legacy software, or isolate environments without needing separate physical hardware. QEMU emulates the hardware components needed by these virtual machines, providing a versatile and powerful tool for developers, testers, and IT professionals to optimize and manage computing resources efficiently.