Quick Tip

Harnessing `stdbuf` for Unbuffered Command Output

Challenge: Some commands, especially those that produce output in real-time or are part of a pipeline, can be buffered by default. This buffering can lead to delays in seeing output or unexpected behavior when piping to other commands, making debugging or monitoring more difficult.

The Solution: Use the stdbuf command to modify the buffering behavior of commands.

stdbuf -o0 your_command_here

Why it works: stdbuf -o0 tells your_command_here to unbuffer its standard output (-o), setting the buffer size to 0 (0), which effectively disables buffering.

Pro-Tip: You can also control standard error (-e) and standard input (-i) buffering with stdbuf. For example, stdbuf -e0 your_command_here will unbuffer standard error.

Linux Tips & Tricks | © ngelinux.com | 4/29/2026