SQL / PHP / Network

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SecTools.Org: Top 125 Network Security Tools http://sectools.org/

Network Security Tools

http://blog.urfix.com/25-ssh-commands-tricks/ Friday, November 19, 2010

SSH

SQL Training

http://www.sqlcourse.com/index.html This unique introductory SQL tutorial not only provides easy-to-understand SQL instructions, but it allows you to practice what you learn using the on-line SQL interpreter. You will receive immediate results after submitting your SQL commands.
http://devzone.zend.com/6/php-101-php-for-the-absolute-beginner/

PHP 101

This area is intended for everyone new to PHP. It opens with a series of informal, entertaining tutorials written by Vikram Vaswani, founder and CEO of Melonfire. These tutorials build on a previously-published 5-part series which has now been updated and extended to embrace PHP 5, making parts of it suitable for those of you who already have worked with PHP 4 in the past.
http://mathworld.wolfram.com/topics/Encryption.html

Encryption

Wolfram Demonstrations Project »

Steve Friedl's Tech Tips

This is a collection of tips on a very wide-ranging list of topics, some of which are not terribly technical. http://www.unixwiz.net/techtips/#sec