nl

nl is a command-line utility that numbers the lines of a file or standard input. It reads lines, adds line numbers, and writes the result to standard output. You can customize the numbering style, starting number, and increment between numbers. It's useful for adding line numbers to code, documents, or any text file for easier reference.

Visit the following resources to learn more:

• @article@Use nl Command in Linux - Step-by-Step Guide
• @video@nl command in Linux with Examples