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  File Operations & Text Processing: The DevOps Power Tools Master the essential text manipulation and file processing skills that every DevOps engineer needs daily. 📅 Published: Feb 2026 ⏱️ Estimated Reading Time: 20 minutes 🏷️ Tags: Linux Text Processing, grep, sed, awk, Redirection, Log Analysis, DevOps Tools 🔄 Redirection & Piping: Controlling Input and Output Understanding the Three Streams Before we dive into redirection, you need to understand that Linux handles three types of data streams: Standard Input (stdin)  - Where programs read data from (usually your keyboard) Standard Output (stdout)  - Where programs write normal output (usually your screen) Standard Error (stderr)  - Where programs write error messages (also usually your screen) These streams have numbers: 0  = stdin 1  = stdout 2  = stderr Output Redirection: Saving Results to Files The  >  symbol redirects output to a file instead of showing it on screen. Th...