title: How to solve jenkins 'Disk space is too low' issue?
body: <p>I have deployed Jenkins in my <em>CentOS</em> machine, <em>Jenkins</em> was working well for 3 days, but yesterday there was a <code>Disk space is too low. Only 1.019GB left.</code> problem. </p>
  
  <p>How can I solve this problem, it make my master offline for hours?</p>