Quick Tip

Redirecting stderr to stdout for Unified Logging

Challenge: When troubleshooting complex shell scripts or command chains, it’s often useful to see both standard output (stdout) and standard error (stderr) in a single stream to get a complete picture of what’s happening.

The Solution: Utilize shell redirection to combine stderr with stdout.

command_that_might_error 2>&1 | your_log_processor

Why it works: The `2>&1` syntax redirects file descriptor 2 (stderr) to file descriptor 1 (stdout). This ensures that any error messages are sent to the same stream as normal output, allowing you to pipe the combined stream to another command like `grep`, `tee`, or `less` for easier analysis.

Pro-Tip: To redirect only stderr to a file, you would use `command_that_might_error 2> error.log`.

Linux Tips & Tricks | © ngelinux.com | 5/14/2026