nl-tool

Number lines of text files, showing line numbers alongside content. Use for reference, indexing, and code line numbering.

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Install skill "nl-tool" with this command: npx skills add dinghaibin/nl-tool

NL - Line Numbering Utility

Add line numbers to text files. Supports configurable number formats, starting values, and numbering schemes. Useful for code review, document reference, and log analysis.

Usage

nl-tool [options] <file>

Options

  • -ba: Number all lines (including blank)
  • -bt: Number non-empty lines only (default)
  • -v N: Start numbering from N
  • -i N: Increment by N for each line

Examples

# Number all lines including blanks
nl-tool -ba script.sh

# Start from 100
nl-tool -v 100 data.txt

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