[tingletech]

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-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.

[iudqnolq]

I'm pretty sure that head pulls from up in the pipeline line-by-line. Interesting to know the mnemonic. Many modern command-line utilities use -v for verbose logging, in my (limited) experience.