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Notes:

UNIX Regular Expressions are feared by normal(?) individuals. As strange/complex as the name sounds. Its name is equivalent to an idiomatic expression. Regular expression is another way to describe a result.

The main objective here is to prove the importance of including UNIX regular expressions as part of your tool kit(skill set).

Listed below are the most common commands that take advantage of Regular expressions:

However the list isn’t all inclusive. The initial examples will primarily deal with grep(1) and awk(1). Then we’ll examine the issues of Regular Expressions as they pertain to perl(1).