How to display Line Numbers in Nano, Vi and VIM

Displaying line numbers in text editors like Nano, Vi, and Vim can be a crucial feature for developers, system administrators, and technical writers. These text editors are available on Linux. It aids in navigation and makes it easier to reference specific lines of code or text. Below is a detailed procedure for enabling line numbers in each of these text editors.

Key Takeaways

• Nano: Press Alt + Shift + 3 (or #) for instant toggle; edit ~/.nanorc for permanent change.
• Vi/Vim: Use the command :set number in Command Mode; edit ~/.vimrc for persistence.
• Quick Check: In Nano, Ctrl + C shows your current line position without enabling a full sidebar.
• Efficiency: Line numbers are essential for debugging code and following system logs accurately.

NANO

Displaying Line Numbers in Nano

Quick Guide:
To display line numbers in Nano, press Alt + Shift + # while the editor is open. This acts as a toggle to instantly show or hide the line count on the left margin. If you simply need to know your current location, pressing Ctrl + C will display the current line and column position in the status bar at the bottom.

Detailed Explanation:

• Open the Nano Editor: Launch your terminal and type nano followed by the name of the file you wish to edit. For example:

nano example.txt

nano example.txt

• Access the Nano Menu: Once the editor is open, you’ll notice a menu at the bottom of the screen. This menu contains various commands prefixed by the caret symbol (^), which represents the Ctrl key.
• Enable Line Numbers: To display line numbers, press Alt + Shift + #. This will toggle line numbers on or off.
• Save Changes: To save any changes you’ve made to the file, press Ctrl + O, then press Enter.
• Exit Nano: To exit the Nano editor, press Ctrl + X.

Top Tip for Nano

Did you know you can quickly view which line you are on in Nano by pressing CRTL+C anywhere in your file? For example:

Want to make setlinenumbers persistent?

1.Edit .nanorc

You can use Nano itself to edit this configuration file. Open your terminal and type:

nano ~/.nanorc 

nano ~/.nanorc 

This will open the nanorc file in your home directory (represented by ~). If the file doesn’t exist, Nano will create it for you.

2. Add the line:

In the Nano editor, add the following line:

set linenumbers

set linenumbers

Save and exit (Ctrl + O, Enter, Ctrl + X).

VI

Displaying Line Numbers in Vi

• Open the Vi Editor: In your terminal, type vi followed by the name of the file you want to edit. For instance:

vi example.txt

vi example.txt

• Enter Command Mode: By default, Vi starts in “Normal” mode. To enter “Command” mode, press Esc.
• Enable Line Numbers: In “Command” mode, type :set number and press Enter. This will display line numbers along the left-hand side of the editor.
• Save and Exit: To save changes and exit Vi, type :wq and press Enter.

VIM

Displaying Line Numbers in Vim

• Launch Vim: Open your terminal and type vim followed by the name of the file you wish to edit. For example:

vim example.txt

vim example.txt

• Switch to Command Mode: Vim starts in “Normal” mode. Press Esc to switch to “Command” mode.
• Activate Line Numbers: In “Command” mode, type :set number and press Enter. This will enable line numbers.
• Persistent Line Numbers: If you want to make this setting permanent, you can add the set number command to your Vim configuration file. To do this, open your .vimrc file by typing vim ~/.vimrc and add the line set number.
• Save and Close: To save your changes and exit Vim, type :wq and press Enter.

Deeper Dive. Want to know more?

Absolute vs. Relative Line Numbers

While standard line numbers are helpful, many developers prefer Relative Line Numbers in Vim. This feature shows the distance from your current cursor position, making it incredibly easy to perform “jumps” (e.g., typing 10j to move down exactly 10 lines).

• To enable relative numbers: Type :set relativenumber
• The Hybrid Approach: Many experts use both :set number and :set relativenumber simultaneously. This shows the absolute number of your current line but relative numbers for everything else.

Troubleshooting Configuration Conflicts

Sometimes, your changes to ~/.vimrc or ~/.nanorc might not appear to work. This usually happens because of system-wide overrides.

• Check Global Configs: If your local file is ignored, check /etc/vimrc or /etc/nanorc.

• Permission Check: Ensure your user owns the config file. You can verify file ownership and permissions using the ls -l command.

For those looking to streamline their workflow further, customizing your bash profile can complement your editor settings for a truly optimized CLI experience.

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