title: Check if process is running
body: <p>I am trying to check if a process is running. If it is running I want a return value of 'OK' and if not a return value of 'Not OK'. I can only use 'ps' without any other arguments attached (eg. ps -ef) if thats the correct term. The code I have is:</p>
  
  <pre><code>if ps | grep file; then  echo 'OK'; else  echo 'NO'; fi
  </code></pre>
  
  <p>The problem with this is that it does not search for the exact process and always returns 'OK', I don't want all the information to appear I just want to know if the file exists or not.</p>