cat app_error_part_* > app_error_rebuilt.log Because split preserves the original order (aa, ab, ac or 00,01,02), cat in the correct order rebuilds the original file perfectly.

Alex verifies with:

To get only the last few chunks (containing the most recent logs), Alex lists them:

Here’s a helpful, practical story about using the split command in Linux. The Log File That Grew Too Large

A junior system administrator who just got paged at 2 AM. A critical application server had an issue, and it generated a massive log file: app_error.log . The file is 8 GB in size.

split Act 1: Basic Splitting – One Giant File → Many Small Files Alex remembers the split command. The goal: break app_error.log into many small, manageable files.