Rocky Linux 9安裝let’s Encrypt

dnf install certbot
firewall-cmd --add-service=http --permanent
firewall-cmd --add-service=https --permanent
firewall-cmd --reload
# 申請mail.test.com 憑證
systemctl stop httpd
certbot certonly --standalone --preferred-challenges http -d  mail.test.com

# 若要renew 請加到crontab
certbot renew --post-hook "systemctl restart httpd"