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FreeBSD 7.0 has already been released. If you are a real hacker, the best way to jump in and learn it is hacking together an introductory kernel module. In this article I’ll implement a very basic module that prints a message when it is loaded, and another when it is unloaded. I’ll also cover the mechanics of compiling our module using standard tools and rebuilding the stock FreeBSD kernel. Let’s do it!
how to use dtrace on solaris
