up, a tool for writing Linux pipes with instant live preview. - up / HN

see also

• Pipe Viewer - add a progress bar to most command-line programs
• How to redirect output to a file and stdout - The command you want is named tee: foo | tee output.file
  • bash tee remove color

• What does ‘pee’ in moreutils do? - bash doesn’t need pee, it can open shell commands as files cat file |tee >(sort -u > sorted) >(sort -R > unsorted)

• How fast are Linux pipes anyway? (blog) / HN - explore how Unix pipes are implemented in Linux by iteratively optimizing a test program that writes and reads data through a pipe.