I don't think the pipe could know that head will have the -n 4. In what context is -v standard for verbose? edit: This stack exchange seems to relevant https:

I don't think the pipe could know that head will have the -n 4. In what context is -v standard for verbose? edit: This stack exchange seems to relevant https://stackoverflow.com/questions/45326901/lazy-non-buffered-processing-of-shell-pipeline https://stackoverflow.com/questions/45326901/lazy-non-buffer... I don't think grep was originally open source. FWIW, the nemonic for -v on grep is inVert. I'm so happy that --long_options are a thing nowadays, much more readable.