Introduction

In this guide, we will learn how to search for a specific term or pattern in a file on a Linux system.

Prerequisites

Before proceeding, ensure you have:

1. A Linux system
2. Access to the command-line interface

Searching for a Term

To search for a term in a file, you can use the grep command followed by the term you want to search for and the name of the file:

grep "search_term" filename

This command will display all lines in the file that contain the specified search term.

Case Insensitive Search

To perform a case-insensitive search, use the -i option with the grep command:

grep -i "search_term" filename

Counting Matches

To count the number of matches instead of displaying the matched lines, use the -c option:

grep -c "search_term" filename

Conclusion

Congratulations! You have learned how to search for a specific term or pattern in a file on a Linux system using the grep command-line tool.