The document discusses the use of regex (regular expressions) in various contexts. It mentions specific grep commands and options related to regex. The date noted indicates when the document was created.

1. Using Regex
Regex - Regular Expressions
Sunday, February 11, 2018 10:24 PM
Grep-Regex Page 1

2. Grep
-i
-o
-w
-v
-A#
-B#
-c
-q
-E
-r
Grep-Regex Page 2