Shell Scripting / Bash Tricks

Stop losing your place in deep shell pipelines

🧩 The Challenge

You know the pain of piping a command into three different tools and then realizing you have no idea where the data got mangled halfway through. I’ve spent way too many nights staring at broken outputs because I couldn’t see what the middle step actually produced.

💡 The Fix

Use the pipe viewer tool to stick a window in the middle of your chain so you can watch the data flow without breaking your command. It acts like a transparent screen that lets you count lines or monitor throughput on the fly.

command1 | pv -l | command2 > output.txt

⚙️ Why It Works

Adding that middle link forces the data stream through a buffer that calculates statistics for you before passing it along to the next binary. It’s essentially a read-only tap that doesn’t mess with the integrity of your piped output.

🚀 Pro-Tip: Use the -N flag to give your pipe a name if you are running multiple monitoring windows at once.

Linux Tips & Tricks | © ngelinux.com | 7/18/2026