I built a tiny Linux tool that shouts “FAHH” when I type the wrong command

I built a tiny Linux tool that shouts “FAHH” when I type the wrong command A few weeks ago I noticed something about the way I work in the terminal. When I’m focused and typing commands fast, I tend to make a lot of small mistakes. Wrong command. Misspelled command. Sometimes I just type something that doesn't exist. And the terminal just replies with the usual: command not found That message is… boring. And also very easy to ignore. So I started thinking: What if the terminal could actually react when I type something wrong? Not visually. Not with an error popup. But with sound . Something dramatic. Something like: FAHH. The idea I wanted something very simple: Whenever I type a command that doesn't exist in the terminal, play a sound. Nothing fancy. Just a tiny reaction that reminds me: "Hey… that command doesn't exist." I initially looked for something like this inside VSCode extensions . There were some interesting ones, but they only worked inside the editor terminal. I wanted som