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Full Discussion: Grep regular expression
Top Forums UNIX for Beginners Questions & Answers Grep regular expression Post 303036274 by MadeInGermany on Friday 21st of June 2019 08:53:48 AM
Old 06-21-2019
Code:
< sudo.txt tr -d "[:blank:]" | egrep '=(\((ALL|root)\))?([[:alpha:]]+:)?/usr/bin/vim'

Explanation of the (\((ALL|root)\))?:
The inner ( ) are for the | scope: ALL OR root.
Then there are the literal parens \( \) around it.
And then there are another ( ) around this for the ? scope: match zero or once.
Note that the greedy .* "match all" often matches too much.
 

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