title: 'No package nginx available' error CentOS 6.5
body: <p>I'm trying to install nginx on CentOS 6.5, then I added these lines on file /etc/yum.repos.d/nginx.repo
  <img src="https://i.stack.imgur.com/vB6od.png" alt="enter image description here"></p>
  
  <p>Then install nginx by: <br><img src="https://i.stack.imgur.com/yg8m9.png" alt="enter image description here"></p>
  
  <p>And I've got a message error: No package nginx available
  How can I fix it? I would greatly appreciate any help you can give me in working this problem!</p>