Quick Tip

Redirecting `stderr` to `stdout` for Unified Logging

Challenge: When debugging or monitoring complex shell scripts and command pipelines, you often need to see both standard output (stdout) and standard error (stderr) in a single, consolidated log. By default, these are directed to separate streams, making analysis difficult.

The Solution: Utilize the `2>&1` redirection operator to merge stderr into stdout.

your_command &> output.log

Why it works: The `2>&1` syntax tells the shell to redirect file descriptor 2 (stderr) to file descriptor 1 (stdout). Combining this with `&>` (a shortcut for `&>1`) sends both streams to the specified file.

Pro-Tip: Use `your_command > output.log 2>&1` to explicitly redirect stdout first, then stderr to stdout. This is often clearer for complex redirections.

Linux Tips & Tricks | © ngelinux.com | 5/2/2026