====== Automatic generate / renew Let's Encrypt certificates ======

Install certbot.
<code>
yum install python2-certbot-apache
</code>

Setup the VirtualHost *:80 entry in your apache configuration for domain.com.
This will generate the certificates and the file domain.com-le-ssl.conf with the VirtualHost *:443 configuration for domain.com. 
<code>
certbot --apache -d domain.com
</code>

Check which certificates were generated.
<code>
certbot certificates
</code>

To manual renew ALL ceritificates:
<code>
certbot renew
systemctl restart httpd (to apply changes if Apache server is used)
</code>

To auto renew the certificate, check if the cron timer was installed (on some OS it may not):
<code>
systemctl status certbot.timer
</code>

If the previous timer was not found, we can add a cron job.
This will renew (if necessary - it will check first) all apache certificates deployed with let's encrypt.
<code>
sudo crontab -e
0 0,12 * * * root certbot -q renew --apache
</code>