On Wednesday, December 08, 2010 01:02:10 pm Les Mikesell wrote: > Standards committees have their ways of breaking all previous existing > implementations with their final decrees. Let me know when they are > finished. Standards committees are never finished. Linux is not standardized, either; in the case of CentOS, SELinux is a de facto standard as it's in the default install set. Linux != posix. The inertia of the installed set means what you learn now will still be usable in the future. Much like with Linux itself.