Well, that was fall-off-a-log easy. Apt-get installed linux-image-2.6-amd64, configured it into LILO, and rebooted. Then installed gcc-multilib, and compiled a hello-world program as gcc -m64 -o hello64 hello.c. Objdump shows it's a 64-bit ELF file. It ran. Awesome. Now to play with some 64-bit Mandelbrot generators.

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