https://chrisjean.com/fix-apt-get-update-the-following-signatures-couldnt-be-verified-because-the-public-key-is-not-available/
https://people.debian.org/~aurel32/qemu/armhf/
https://blog.geunho.dev/posts/docker-old-os-editor/
블로그 3개만 참고하면 뚝딱!
qemu-system-arm -M vexpress-a9 -kernel vmlinuz-3.2.0-4-vexpress -initrd initrd.img-3.2.0-4-vexpress -drive if=sd,file=debian_wheezy_armhf_standard.qcow2 -append "root=/dev/mmcblk0p2 rw physmap.enabled=0 console=ttyAMA0" -net user,hsotfwd=tcp::2242-:22 -net nic -nographic
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바이너리만 실행 시