title: Does renewing SSL certificate require re-issuing the cert?
body: <p>I have an SSL certificate that I am using to secure port 443 (HTTPS) on my nginx server running on Ubuntu for about 10 months now.</p>
  
  <p>When I bought the cert, I got it for one year, so I have about 2 more months with this certificate. 
  My question is: "When I renew this cert, Will I just need to pay for renewal? or will I have to re-issue the cert with a new CSR, and have a potential downtime while installing?</p>
  
  <p>I need to plan for any downtime from now.</p>
  
  <p>Thanks in advance for your answers.</p>