<a href="https://medium.com/@leeli0830/automating-the-renewal-of-lets-encrypt-certificates-a-comprehensive-guide-cb30c9b9e838">U R L</a><br />
sudo certbot certonly --webroot -w /var/www/html/ -d iconcert.kr  해서 renewal했음<br />
Check expire Date<br />
sudo openssl x509 -noout -dates -in /etc/letsencrypt/live/iconcert.kr/cert.pem<br />
<br />
sudo certbot renew --dry-run<br />
sudo certbot renew --cert-name iconcert.kr<br />
crontab guru 시간 확인<br />
sudo crontab -e<br />
