up
A tool for writing Linux pipes with instant live preview
...To start using up, redirect any text-emitting command (or pipeline) into it. Use PgUp/PgDn and Ctrl-[←]/Ctrl-[→] for basic browsing through the command output. In the input box at the top of the screen, start writing any bash pipeline; then press Enter to execute the command you typed, and the Ultimate Plumber will immediately show you the output of the pipeline in the scrollable window.