title: How to know how much processes are running?
body: <p>From a first sight it looks like a very simple question.</p>
  
  <p>But Google did not help.</p>
  
  <p>What I'd like to understand is how to use command line in Linux (CentOS) to see HOW MUCH PROCESSES are running ?</p>
  
  <p>Not "what processes" - but just a general quantity of running processes.</p>
  
  <p>I mean - we enter a command in shell and have an answer something like</p>
  
  <p>Total running processes = 258</p>
  
  <p>That's all.
  Thanks for a hint !</p>