title: Installing Ruby 1.9.2 through RVM fails
body: <p>I installed RVM following the official guide on <a href="http://rvm.beginrescueend.com/" rel="nofollow noreferrer">rvm</a>. I installed Ruby 1.8.7 with <code>rvm install 1.8.7</code> and then set it as default with <code>rvm 1.8.7 --default</code>.</p>
  
  <p>Then I tried to install 1.9.2 with <code>rvm install 1.9.2</code>, and also tried <code>rvm install 1.9.2-head</code>. Everything went fine until I got to the "ruby-1.9.2-head - #installing-part".</p>
  
  <p>Then I got a huge error list complaining about my *nix bash commands:</p>
  
  <pre><code>/Home/kevin/.rvm/scripts/Manager: line 1760: sed: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1762: mv: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1762: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1632: cp: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  /Home/kevin/.rvm/scripts/utilities: line 233: mkdir: command not found
  /Home/kevin/.rvm/scripts/utilities: line 237: date: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  /Usr/bin/env: bash: The file or directory does not exist
  /Home/kevin/.rvm/scripts/utilities: line 233: mkdir: command not found
  /Home/kevin/.rvm/scripts/utilities: line 237: date: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  /Home/kevin/.rvm/scripts/Manager: line 1736: mkdir: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1738: ln: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1760: sed: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1762: mv: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1762: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1760: sed: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1762: mv: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1762: chmod: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  /Home/kevin/.rvm/scripts/utilities: line 233: mkdir: command not found
  /Home/kevin/.rvm/scripts/utilities: line 237: date: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  /Usr/bin/env: bash: The file or directory does not exist
  /Home/kevin/.rvm/scripts/Manager: line 1562: cp: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1573: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1562: cp: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1573: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1562: cp: command is not
  /Home/kevin/.rvm/scripts/Manager: line 1573: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1562: cp: command not found
  /Home/Kevin/.rvm/scripts/Manager: line 1573: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1562: cp: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1573: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1562: cp: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1573: chmod: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1562: cp: command not found
  /Home/kevin/.rvm/scripts/Manager: line 1573: chmod: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  /Home/kevin/.rvm/scripts/utilities: line 276: mkdir: command not found
  /Home/kevin/.rvm/scripts/utilities: line 280: date: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  /Home/kevin/.rvm/scripts/utilities: line 656: cp: command not found
  /Usr/bin/env: bash: The file or directory does not exist
  </code></pre>
  
  <p>If I enter <code>rvm 1.9.2 --default</code> I get the same error output and my <code>$PATH</code> variable is completely cleared.</p>
  
  <p>Does anyone have a solution on this problem?</p>