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#

bash

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#

bash

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

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