title: Jenkins: how to run builds in unique directories
body: <p>I am configuring Jenkins for the first time, have been a user of it until now.</p>
  
  <p>I read the documentation and understand what "$WORKSPACE" means on the <strong>slave</strong>.</p>
  
  <p>I had a misconception that by <strong>default</strong> the jobs on Jenkins Slave run in a unique directory per job inside the workspace directory. This doesnt seem to be the case.</p>
  
  <p>How do I assign a unique directory per job run?
  Will Jenkins automatically cleanup this job run directory after its done?</p>