title: Extracting file with folders then using bash completion
body: <p>I don't work much with bash scripting and was trying to do something like this:</p>
  <pre><code>#!/bin/bash
  wget https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-i686-static.tar.xz
  tar xvf ffmpeg-git-i686-static.tar.xz
  cd ./ffmpeg-git-20210501-i686-static/
  cp ./ffmpeg-git-20210501-i686-static/ffmpeg /etc/bin
  </code></pre>
  <p>Is there a variable or a way I can determine what that extracted folder is called during script execution. For example with bash completion at the command line I would use cd ./ffmpeg (since I know it starts with ffmpeg)</p>
  <p>Make sense?</p>