# yum install git epel-release
# yum install gcc libffi-devel python-devel openssl-devel
# cd /root
# git clone https://github.com/letsencrypt/letsencrypt
# cd /root/letsencrypt
# ./letsencrypt-auto certonly -a standalone -d yourdomain.com -d www.yourdomain.com
right method
./letsencrypt-auto --apache -d greencom.com.tw -d www.greencom.com.tw
Let’s encrypt 會將憑證檔案放到 /etc/letsencrypt/live/.
# yum install mod_ssl