Sometimes, we may want to test out some Raspberry Pi images, but we don't have the Raspberry Pi readily available to install the new image on. Also, maybe we want to make sure that a particular security tool functions correctly or that the graphical interface is something we like without re-installing ou Pi. Well, that is where QEMU comes in.
Quick EMUlator (QEMU) is an emulator that lets us mimic many different processors and load many different operating systems on another operating system. In our case, we mimicked the ARM-based processor in the Raspberry Pi and were successfully able to load and run multiple operating systems just like we would have done on a real Raspberry Pi. Emulation is not without its problems. Sometimes, operating systems would not load or would have performance issues, crash, stop working, and so on, even when they had absolutely no issues on the real Raspberry Pi hardware. Because of these issues, our mileage...