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Extended Regular Expressions (ERE)

Explore the use of extended regular expressions in Bash shell scripting to enhance your data processing skills. Understand metacharacters such as ?, +, and | which allow flexible pattern matching. This lesson helps you apply regex concepts for efficient searching and manipulation of text data in command-line environments.

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Metachar ?

Matches the preceding element zero or one time.

Example:

xy?z matches only "xy" or ...