stdbuf

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

• Change stdin buffer size to 512 KiB:

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

• Change stdout buffer to line-buffered:

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

• Change stderr buffer to unbuffered:

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