title: How to compile multiple files at once from command line?
body: <p>I'm beginning with lesscss and I don't want to use some GUI tools but command line only.</p>
  
  <p>My structure is the following<br>
  root<br>
  --- less<br>
  --- css  </p>
  
  <p>I would like to compile all less files to the css folder. How to achieve this ? </p>
  
  <p>Thanks in advance!</p>