Install certbot
"echo "deb http://ftp.debian.org/debian stretch-backports main" | sudo tee --append /etc/apt/sources.list
sudo apt-get update
sudo apt-get install python-certbot-apache -t stretch-backports
Setup certbot
# setup certificate for chosen websites, force http to https
sudo certbot --apache
Simulate certificate renewal
sudo certbot renew --dry-run
Check if certbot cron entry is created
tail -1 /etc/cron.d/certbot