If I want to use extended regex features in a grep statement, what flag do I need to use?Group of answer choices-x-R-E-r

Question

If I want to use extended regex features in a grep statement, what flag do I need to use?

Group of answer choices

-x
-R
-E
-r

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Solution

Identify the Requirement

You want to use extended regex features with the grep command.

Relevant Concepts

In grep, standard expressions can be extended to include additional features like +, ?, and | using specific flags.

Answering the Question

The flag you need to use for extended regex features is -E. This flag allows grep to interpret the regular expression in extended mode.

Final Answer

To use extended regex features in a grep statement, use the -E flag. Therefore, the correct choice from the options given is E.

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