Operating Systems Directory
Category Websites
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My Sysad Blog -- Unix
This blog covers UNIX system administration HOWTO tips for using inline for loops, find command, UNIX scripting, configuration, SQL, various UNIX-based tools, and command line interface syntax.
http://www.mysysad.com
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Wintools.net Professional
Suite of tools for increasing MS Windows operating system performance.
http://www.wintools.net