Linux and Unix grep command

Linux / UNIX grep Command Tutorial series.

1. How To Use grep Command In Linux / UNIX
2. Regular Expressions In grep
3. Search Multiple Words / String Pattern Using grep Command
4. Grep Count Lines If a String / Word Matches
5. Grep From Files and Display the File Name
6. How To Find Files by Content Under UNIX
7. grep command: View Only Configuration File Directives