These are articles that have been published at other places.

Finding xargs – Linux Journal Issue 189 (January 2010)
Real Work on Virtual Terminals – Linux Journal Issue 188 (December 2009)
People, Research, Excellence – Linux Journal Issue 187 (November 2009)
Is Telnet Really the Root of All Evil? – Linux Journal Issue 186 (October 2009)
Mac OSX – Linux Journal Issue 185 (September 2009)
at, batch and cron – Linux Journal Issue 184 (August 2009)
bc – Linux Journal Issue 183 (July 2009)
Use Python for Scientific Computing -  Linux Journal Issue 175 (November 2008)

Developing for Windows on Linux – Linux Journal Issue 123 (July 2004)
Using the Clone() System Call – Linux Journal Website