Getting started with shell scripting: 
The world’s best conceptual introduction to shell scripting comes from an old AT&T training video. In the video, Brian W. Kernighan (the “K” in awk) and Lorinda L. Cherry (co-author of bc) demonstrate how one of the founding principles of UNIX was to empower users to leverage existing utilities to create complex and customized tools.
read more: Opensource.com sethkenlon
Supporting Open Source.
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