up is the Ultimate Plumber, a tool for writing Linux pipes in a
terminal-based UI interactively, with instant live preview of
command results.

The main goal of the Ultimate Plumber is to help interactively and
incrementally explore textual data in Linux, by making it easier
to quickly build complex pipelines, thanks to a fast feedback loop.
This is achieved by boosting any typical Linux text-processing
utils such as grep, sort, cut, paste, awk, wc, perl, etc., etc.,
by providing a quick, interactive, scrollable preview of their
results.
