Grep options for Regular Expressions. (ERE, BRE, Perl regex) differences
9141
Why does my regular expression work in X but not in Y?
1388
Learning Regular Expressions
322
clear meaning of .* in regex
111843
How do I grep for all non-ASCII characters?
2559
Is there a regular expression to detect a valid regular expression?
90078
Non greedy (reluctant) regex matching in sed?
92530
Use of quotes in GNU grep regular expressions
137248
regular expressions / pattern matching on ubuntu command line
33198
grep not working as expected
83564
How to grep lines which does not begin with "#" or ";"?
156045
How do I grep for lines containing either of two words, but not both?
140097
R grep: is there an AND operator?
120134
List of all special characters that need to be escaped in a regex
118486
Detecting pattern at the end of a line with grep
104414
JavaScript regular expressions and sub-matches
135638
The difference between \e and ^[
151275
grep. Find multiple AND patterns in any order using single condition