Quick Tip

Redirect stderr to stdout for Unified Logging

Challenge: When running complex commands or scripts, error messages (stderr) and standard output (stdout) are often displayed separately. This can make it difficult to analyze logs or redirect both streams to a single file for easier troubleshooting.

The Solution: Utilize the `2>&1` redirection operator.

your_command_here 2>&1 | tee output.log

Why it works: File descriptor 1 represents stdout, and file descriptor 2 represents stderr. The `2>&1` syntax redirects stderr (file descriptor 2) to the same location as stdout (file descriptor 1). Piping this combined stream to `tee` then writes it to the console and the specified log file.

Pro-Tip: You can also redirect only errors to a separate file by using `your_command_here 2> error.log`.

Linux Tips & Tricks | © ngelinux.com | 6/14/2026