Which Linux command or utility is simple, powerful, and surprisingly unknown to many people or used less often?
This could be a command or a piece of software or an application.
For example I’m surprised to find that many people are unaware of Caddy, a very simple web server that can make setting up a reverse proxy incredibly easy.
Another example is fzf. Many people overlook this, a fast command-line fuzzy finder. It’s versatile for searching files, directories, or even shell history with minimal effort.
It’s a simple command line calculator! I use it all the time.
Very useful for shell scripts that need to do maths as well. I use it to make percentages when stdout has values between 0.0 and 1.0
I once wrote a bc script that calculated parameters for the Blackman window for a FIR filter. (Had formulas already so not that impressive) Upped the precision until it needed like 30 sec to calculate, completely unnecessarely :).