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http://www.cyberciti.biz/tips/linux-a...o-see-who-made-changes-to-a-file.html
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http://home.zyrianes.net/cgi-bin/wkcgi.cgi/Article/143.html
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http://workaround.org/articles/ispmail-sarge
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http://www.instant-vpn.com/how_it_works.asp
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http://www.koumoula.com/wifi/eap-tls/eap-tls.htm
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http://www.hardened-php.org
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http://www.bsdnews.org/03/cryptusb.php
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http://evanjones.ca/software/fakeaps.html