Linux was created by software enthusiasts who wanted to make it available to all for free. The source code was also kept open so that anyone can contribute to it. A Linux loving community was formed which worked on it relentlessly to make it a strong and robust operating system. These people have added commands that made Linux very powerful and popular.

Grep is one such command in Linux which as a user you will find very helpful. Let us see how grep can be used to make your work easier. We assume you have a basic knowledge of Linux. If not, we recommend you first go through this simple Linux crash course.

Full article here:
Grep command in linux – Get a grip on it (udemy.com)