How to Renew Let's Encrypt SSL Certificate

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Free SSL certificates from Let's Encrypt certify are issued for a short 3 month term. I first enabled secure HTTPS pages around at start of 2016, and now it's time to renew SSL. 

The following tutorial is written for Nginx, but should work for Apache as well (with minor modifications)

Stop Nginx​

sudo service nginx stop

To trigger the renewal process for all installed domains, run this command:

sudo /opt/letsencrypt/letsencrypt-auto renew

Start Nginx

sudo service nginx start

Now, check from your browser window your site, does SSL certificate validity has been extended for next 90 days,