Shell Scripting #0006 - How to search inside a file in Unix?

Keywords: Linux, Shell Scripts, Scripting, Bash, Grep, Regex, Regular Expression

Problem: You have a folder with numerous files in it and you have to look for a specific word in all the files inside the folder. How to search inside a file in Unix?

Solution: 

File(s) contains a word in a particular directory or Search Recursively inside a folder (Category: Shell Scripting)

grep -inR "word_to_search" * 

-i ---> Incase-sesitive 

-n ---> Number of the line, the word is lying 

-R ---> Recursive 

* ---> Search in all the folder(recursively)

Example: