How to renew a standalone Let's Encrypt cert

If you deployed Let's Encrypt SSL certificate independently with nginx (standalone), you can't renew that cert while nginx is running. The only way is to stop nginx and proceed the renewal than start nginx again. Here is a bash script that you can use as crontab (e.g. /opt/my_scripts/

Note: the script requires ssl-cert-check package so install it using this:

sudo apt install ssl-cert-check

Set the crontab as following:

0 */12 * * * /opt/myh_scripts/ > /var/log/renew_cert.log 2>&1