Quick Tip

Harness `stdbuf` for Unbuffered Command Output

Challenge: Sometimes, when piping the output of a command through another, you encounter delays or incomplete output. This can happen because commands often buffer their output to improve efficiency, but this buffering can be problematic for real-time processing or when you need immediate feedback.

The Solution: Use the stdbuf command to control buffering for command output.

stdbuf -oL your_command | another_command

Why it works: The -o L flag tells stdbuf to set the standard output stream to line buffering, ensuring that each line of output is flushed immediately. This prevents delays caused by buffering when piping data.

Pro-Tip: You can also use -e L to control stderr buffering or -i L for stdin buffering if needed.

Linux Tips & Tricks | © ngelinux.com | 5/12/2026