Working on a *nix system is no piece of cake. Especially when you are used to Graphic interface of ‘windows’. The world where mouse is the king.
Here is a list of most used / most discussed / most important *nix commands. Mastering this will surely get your confidence level high in the black background and white characters’ world !!
My experience says that for starters in UNiX / LiNuX , these commands are enough to get you in smoothly ! 
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AWK is a general purpose programming language that is designed for processing text-based data, either in files or data streams, and was created at Bell Labs in the 1970s
I noticed that Erik Wendelin wrote an article “awk is a beautiful tool.” In this article he said that it was best to introduce Awk with practical examples. I totally agree with Erik.
Eric Pement’s Awk one-liner collection consists of five sections:
The first part of the article will explain the first two sections: “File spacing” and “Numbering and calculations.” The second part will explain “Text conversion and substitution”, and the last part “Selective printing/deleting of certain lines.” Continue reading »