tldr/pages/common/stdbuf.md

stdbuf

Run a command with modified buffering operations for its standard streams. More information: https://www.gnu.org/software/coreutils/manual/html_node/stdbuf-invocation.html.

• Change the standard input buffer size to 512 KiB:

stdbuf --input={{512K}} {{command}}

• Change the standard output buffer to line-buffered:

stdbuf --output={{L}} {{command}}

• Change the standard error buffer to unbuffered:

stdbuf --error={{0}} {{command}}