How to install and manage Letsencrypt certificate certbot on Ubuntu - quick guide

This is a quick reference guide to Add the free ssl certificate letsencrypt to your site , if you don't like to go deep into details .
First create letsEncrypt certificate following these commands :

  sudo a2ensite default-ssl

  sudo add-apt-repository ppa:certbot/certbot 

  sudo apt-get update 

  sudo apt-get install python-certbot-apache 

  sudo certbot --apache -d example.com 

To check certificate validation :

  https://www.ssllabs.com/ssltest/analyze.html?d=example.com&latest 

To check certificate dates :

  echo | openssl s_client -connect yourdomain.tld:443 -servername yourdomain.tld 2>/dev/null | openssl x509 -noout -dates 

OR

 openssl x509 -noout -dates -in /etc/letsencrypt/live/yourdomain.tld/cert.pem 

add to cron job

  crontab -e 

add this line:

  0 0 1,15 * * /usr/bin/certbot renew --quiet 

How to renew the certificate :

 certbot renew