The famous quote from Shakespeare’s Hamlet, “To be or not to be,” can be represented by the following regular expression:
(2b | [^b] {2})
If you used this expression when searching a text file using the egrep command (egrep "(2b|[^b]{2})" filename), what would be displayed? Try this command on a file that you have created. Why does it display what it does? That is the question.
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