FreeBSD, enterprise open source stuff, network and system security. I'm by no means an expert software developer, but I've been using PHP since 1995 and can find the bathroom on my own. Bourne shell and awk since the 1980s. My serial breakout box is still in good working order. My name here was my UUCP pathalias entry. And if you know what that means, you're old too. :-/
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