Quick Tip

Tame Your Logs: Unifying `stderr` and `stdout` with `2>&1`

Challenge: When running commands or scripts, error messages (stderr) and normal output (stdout) often get mixed up or sent to different destinations, making it difficult to analyze the complete picture, especially when redirecting output to a file.

The Solution: Use the `2>&1` redirection operator to send both standard error and standard output to the same destination.

your_command > output.log 2>&1

Why it works: File descriptor 1 (stdout) is redirected to `output.log`, and then file descriptor 2 (stderr) is redirected to the same place as file descriptor 1. This ensures all output, including errors, is captured in a single log file.

Pro-Tip: For a more robust script, consider using `set -o pipefail` at the beginning of your script to ensure that a pipeline fails if any command within it fails, even if the final command succeeds.

Linux Tips & Tricks | © ngelinux.com | 5/17/2026