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→Using the awk Utility
'''Selection Criteria'''
* You can use a regular expression, enclosed within slashes, as a pattern. ��For For example: '''/pattern/�'''* The ~ operator tests whether a field or variable matches a �regular regular expression.��For For example: '''$1 ~ /^[0-9]/�'''
* The !~ operator tests for no match.��For example: $2 !~ /line/
* You can perform both numeric and string comparisons using �relational operators ( > , >= , < , <= , == , != ).
