title: What's the difference between $(command here) and `command here`
body: <p>In bash scripting what is the difference between $(command) and `command`. They both return the output of the command. </p>
  
  <p>Let's say echo "There are $(wc -l &lt; /etc/group) lines." and echo "There are `wc -l &lt; /etc/group` lines.</p>
  
  <p>They both print the same result.</p>