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What is QEMU?

QEMU is a simulator that supports various target processors (such as x86, ARM, MIPS, etc.). It has two main modes:

  • user mode simulation: run a Linux program on another Linux machine that doesn't necessarily have the same processor; for instance, if the host is an i386 Linux machine, one can run ARM Linux programs
  • system simulation: run a full operating system; for instance, run an ARM Debian distribution on an x86_64 machine.