The DEFINE_MACHINE command is used in QEMU to define a new virtual machine architecture. It allows users to create customized virtual machines that can be used for specific purposes. The command takes several parameters, including the name of the machine, the type of CPU, memory size, and other hardware specifications. Once a machine has been defined using this command, it can be launched and run using QEMU. This enables users to test software or operating systems on different architectures without needing physical hardware.
