:Linux.com: CLI Magic: Regular Expressions and Metacharacters
Linux.com: CLI Magic: Regular Expressions and Metacharacters Aug 2, 2005, 06 :15 UTC (0 Talkback[s]) (4545 reads) (Other stories by Mark Alexander Bain)
"Most of us probably use regular expressions--pattern that describes a set of characters--every day without realizing it. Chances are, however, that you aren't really using them to their full potential.
"Consider how you search a file for a word. You probably type something like: