Quick Tip

Harness `stdbuf` for Unbuffered Command Output

Challenge: Sometimes, when piping output from a command to another, or when redirecting to a file, the output might be buffered, leading to delayed or incomplete results, especially in scripting or interactive sessions where real-time feedback is crucial.

The Solution: Use the `stdbuf` command to control the buffering mode of a command’s input, output, or error streams.

stdbuf -o0 your_command

Why it works: The `-o0` option tells `stdbuf` to set the standard output stream of `your_command` to unbuffered mode (zero bytes), ensuring that data is written immediately as it’s generated.

Pro-Tip: You can also use `-e0` for unbuffered stderr, or `-i0` for unbuffered stdin if needed. For example, `stdbuf -o0 -e0 your_command` will make both stdout and stderr unbuffered.

Linux Tips & Tricks | © ngelinux.com | 5/27/2026