title: What are the options with - (dash) on Linux terminal command mean?
body: <p>I know very many options exist but in a Linux command like</p>
  
  <pre><code>chmod -R 777 user
  </code></pre>
  
  <p>What does the <code>-R</code> mean, I know how to use a couple of them but all this I have learnt from tutorials hence I don't really know what to search if I want to learn this part of terminal commands. If anyone has any sources that helped them when they were still fresh in terminal commands, I would appreciate.</p>