title: yum install , Update returns 404 error in centos 6.6
body: <p>yum doesnt work at all,</p>
  
  <p>yum install , update doesnt work gives below error </p>
  
  <pre><code>yum update
  Loaded plugins: fastestmirror
  Setting up Update Process
  Loading mirror speeds from cached hostfile
   * epel: archive.linux.duke.edu
  http://mirror.centos.org/centos/6/SCL/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: scl. Please verify its path and try again
  </code></pre>
  
  <p>centos version 6.6
  python 2.6</p>
  
  <p>Please help me if any one knows about this.</p>
  
  <p><strong>EDIT1:</strong></p>
  
  <p>When tried with ,</p>
  
  <pre><code> yum --enablerepo=extras install centos-release-scl
  </code></pre>
  
  <p>Loaded plugins: fastestmirror</p>
  
  <p>Error getting repository data for extras, repository not found</p>
  
  <p>Got the above error</p>