Quick Tip

Taming Terminal Noise: Unified Logging with `2>&1`

Challenge: When running commands or scripts, you often get both informational output (stdout) and error messages (stderr) printed to your terminal. This can make it difficult to parse logs or redirect output cleanly.

The Solution: Redirect both standard output (stdout) and standard error (stderr) to a single destination using the `2>&1` syntax.

your_command 2>&1 | tee output.log

Why it works: In shell scripting, file descriptor `1` represents stdout and `2` represents stderr. The `2>&1` directive tells the shell to send file descriptor 2 (stderr) to the same location as file descriptor 1 (stdout). The `tee` command then splits this unified stream to both the terminal and the `output.log` file.

Pro-Tip: For simply discarding error messages and only keeping stdout, you can redirect stderr to `/dev/null`: `your_command 2>/dev/null`

Linux Tips & Tricks | © ngelinux.com | 6/9/2026