Install certbot and letsencrypt
sudo apt install certbot letsencrypt
sudo apt-get install python3-certbot-apache
Create a certificate:
sudo certbot certonly --manual --preferred-challenges=dns
List Certificates:
sudo certbot certificates
Renewing certificates:
sudo certbot certonly --manual --preferred-challenges=dns -d mbirgin.com,*.mbirgin.com
Automatic renewing existing certificates
This method doesn't work for dns challenges
sudo certbot renew
References: