Create letsencrypt.md

Author: georgemillard

letsencrypt.md

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+### Installing SSL certificates with letsencrypt and certbot
+
+[Useful tutorial here](https://www.digitalocean.com/community/tutorials/how-to-set-up-let-s-encrypt-certificates-for-multiple-apache-virtual-hosts-on-ubuntu-14-04)
+
+#### Install certbot
+```
+sudo add-apt-repository ppa:certbot/certbot
+
+sudo apt-get update
+
+sudo apt-get install python-certbot-apache
+```
+
+#### Install certificates
+Best to install all subdomains along with root domain
+
+`sudo certbot --apache -d example.com -d www.example.com`
+
+#### Delete a cerificate 
+Note this will cause apache errors, as references to the cart are not removed. Best to a2dissite the site first.
+
+`certbot delete`
+
+#### Check renewal status
+
+```
+sudo apt-get ssl-cert-check
+su root
+cd /etc/letsencrypt/live
+ssl-cert-check <my_domain>/cert.pem
+```
+