A new Bash script on DEV Community automates rounding numeric columns in CSV files. Using `awk`, it processes a specified file, rounding values to a set number of decimals. The tool handles user input for file name, precision, and target columns, offering a command-line solution for data sanitization and formatting.

This script solves a common chore for developers and data analysts working with raw data dumps. Standard command-line tools often lack built-in rounding functions, forcing manual work in spreadsheets. This utility streamlines that workflow directly in the terminal, which is essential for reproducible data pipelines.

The code employs `awk` for its text-processing strength, calculating a scaling factor for precision. It iterates through specified columns, applying true numeric rounding with an epsilon adjustment to avoid floating-point errors. This ensures accuracy where simple string manipulation would fail, making it a reliable tool for data prep.

Engineers can integrate this script into larger ETL jobs or cron jobs for automated data cleaning. It’s a practical example of using shell scripting to solve a specific problem without heavier dependencies. For teams managing data via CLI, this reduces friction and improves data quality before analysis.