add new file (#1550)

* add new file

* first commit

* regular expressions

* Add escape character

* grep command

* Sed command: Part 1

* Sed command: Part 2

* Sed command: complete

* awk command: Part1

* awk command: Part2

* awk command: Part3

* awk command:Part4

* awk command: Part5

* awk command: Part6

* awk command: Part7

* awk command: Part8

* awk command: Part9