"As far as making use of the CPU feature once it's not disabled
in the BIOS, you're already using it if you're running a 64bit
kernel. And if you’re using 32bit, you can start using it if
you install the -server flavor of the 32bit kernel. As a bonus, you
get to address all your physical RAM if you do this too (since
-server's "PAE" mode is the kernel mode that allows "nx" to work).
For Ubuntu Jaunty, I'm hoping to get some element of the system
(installer? jockey?) to make the right kernel selection for a given
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