How to Show Line Numbers in Nano Editor?

Nano is a popular and user-friendly text editor available on Unix-based systems, known for its simplicity and ease of use. While Nano provides essential features for text editing, such as syntax highlighting and search functionality, showing line numbers by default isn't one of them. However, it's possible to enable line numbering in Nano, which can be particularly helpful for referencing specific lines or debugging code. In this article, we'll explore different methods to show line numbers in Nano editor with multiple examples and their explanations.

Method 1: Command-line Option

The simplest way to enable line numbering in Nano is by using the `-l` or `--line` command-line option when opening a file. Here's how you can do it:

First, we will display the content of the file name "filename.txt" using cat command in linux.

cat filename.txt

Now we will use option `-l` to get line numbers when we open file with nano editor.

nano -l filename.txt

or

nano --line filename.txt

This command will open the specified file in Nano with line numbers displayed at the left margin.

Method 2: Nano Configuration File

Alternatively, you can make line numbering permanent by modifying the Nano configuration file. Follow these steps:

Step 1: Open Nano Configuration File

sudo nano /etc/nanorc

Add set linenumbers in the nanorc file

Now if we create any nano file we will automatically see the line numbers.

nano example.txt

Method 3: Shortcut

Nano allows toggling line numbering on and off using a keyboard shortcut. While editing a file in Nano, press Alt + Shift + 3 to toggle line numbering. This shortcut is handy for quickly enabling or disabling line numbers without exiting the editor.

Conclusion

Enabling line numbers in Nano editor enhances productivity, especially when working with large text files or codebases. By following the methods outlined in this article, users can easily configure Nano to display line numbers based on their preferences. Whether it's using command-line options, modifying the Nano configuration file, or utilizing keyboard shortcuts, Nano provides flexible options for showing line numbers, catering to various user needs and workflows.