1.Ubuntu系统下开放所有端口
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -F
2.运行Acme脚本（需要有个DNS解析好的域名）
curl https://get.acme.sh | sh
3.申请证书及密钥
~/.acme.sh/acme.sh –register-account -m xxxx@gmail.com
~/.acme.sh/acme.sh –issue -d 你的域名 –standalone
4.下载证书及密钥
~/.acme.sh/acme.sh –installcert -d 你的域名 –key-file /root/private.key –fullchain-file /root/cert.crt
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证书路径
/root/cert.crt 公钥
/root/private.key 密钥