title: How do I uninstall an old version of Ruby, and is it a wise thing to do?
body: <p>When logged in as root and I type <pre>ruby -v</pre> centOS server reports 'ruby 1.9.3p392'. This is what I want.</p>
  
  <p>But if I put <pre>rvmsudo ruby -v</pre> then I get 'ruby 1.8.7'. I do not want to use this older version, it is causing problems for my gitlab install.</p>
  
  <p>I would like to remove it and make sure only v1.9 is used, how can I do this? Or should I leave it there but try and require certain users to use a different version?</p>
  
  <p>Also, in case doing this messes anything up, is it possible to either;</p>
  
  <p>a.see if anything on the server requires v1.8?</p>
  
  <p>b.reverse the uninstall if it causes a problem?</p>