Sys

Certbot failed to renew certificate to all domains hosted in a particular server. While most of the servers shoot the bot to acquire the certificate, it bug me why some didn't when they have the same setup. I guess because a domain or two in those failed servers are using premium SSL, but I am not sure honestly.

Certbot will let you manage your SSL certificates, ensuring that your server will automatically renew Let's Encrypt without you doing it by hand.

Create a database named database_name and enter your root database password
mysql -u root -p -e "CREATE DATABASE database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci";

Create a Drupal site directory. For this setup, websites are at /var/www/
cd /var/www
mkdir example.com

Note: Use Certbot for easy management of Let's Encrypt SSL certificates.

Code:
chown -R www-data:www-data /path/to/folder/

Note that this is a personal workflow of mine and not a tutorial.  Commands may vary according to your setup.