title: yum in linux not working
body: <p>I try to install passenger in my linux. And, when I use</p>
  
  <pre><code>yum update
  </code></pre>
  
  <p>Response is</p>
  
  <pre><code>Loaded plugins: priorities, security, update-motd, upgrade-helper
  amzn-main                                                         | 2.1 kB     00:00     
  amzn-main/primary_db                                              | 2.4 MB     00:00     
  amzn-updates                                                      | 2.3 kB     00:00     
  amzn-updates/primary_db                                           | 700 kB     00:00     
  http://passenger.stealthymonkeys.com/rhel/latest/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
  Trying other mirror.
  http://passenger.stealthymonkeys.com/rhel/latest/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
  Trying other mirror.
  http://mirror.hmdc.harvard.edu/mirrors/passenger/rhel/latest/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"
  Trying other mirror.
  Error: Cannot retrieve repository metadata (repomd.xml) for repository: passenger. Please verify its path and try again
  </code></pre>
  
  <p>It is so weird, what happened to my linux?</p>
  
  <p>Yes, the server is redhat.</p>