Using system calls

http://www.ibm.com/developerworks/linux/library/l-system-calls/index.html

Principles of PHP mastery

http://nettuts.com/articles/10-principles-of-the-php-masters/

Korn shell scripting

http://www.ibm.com/developerworks/aix/library/au-kornshellscripting/index.html

A simple GUI for python

http://www.linux.com/feature/145949

Standardize your apps

http://www.linux.com/feature/144170

Coding solutions for web designers

http://www.smashingmagazine.com/2008/08/11/5-useful-coding-solutions-for-designers-and-developers/

Make your network printer wireless

http://computerguru365.blogspot.com/2007/04/diy-wireless-network-printer.html

Flash tutorial sites

http://sixrevisions.com/flashactionscript/flash_tutorial_websites/

Create templates for your web site

http://www.ibm.com/developerworks/web/library/wa-customtemp/index.html?S_TACT=105AGX08&S_CMP=EDU

DIY RSS in PHP

http://www.ibm.com/developerworks/library/wa-aj-rssphp/index.html?S_TACT=105AGX44&S_CMP=EDU

Free courses at Google

http://code.google.com/edu/

Development tips

http://sourcemaking.com/design-patterns-and-tips

Free online Linux courses

http://www.vagabondodigitale.com/2008/01/10-sites-offering-free-linux-courses-online.html

DIY network cable video

http://www.youtube.com/watch?v=HNu2NDTiZ44

Writing midlets on Linux

http://www.linux.com/feature/122050

Building secure web apps

http://www.linux.com/feature/123070