https://certbot.eff.org/instructions?ws=nginx&os=ubuntufocal

安装certbot

  sudo snap install --classic certbot

配置certbot命令

sudo ln -s /snap/bin/certbot /usr/bin/certbot

安装证书

//nginx一起安装
 sudo certbot --nginx
//仅安装证书
sudo certbot certonly --nginx

选择域名

测试续期

查看自动续期是否开启

sudo certbot renew --dry-run

结果如下:

Congratulations, all simulated renewals succeeded:
  /etc/letsencrypt/live/pc.netrelay.cn/fullchain.pem (success)
  /etc/letsencrypt/live/server.netrelay.cn/fullchain.pem (success)
  /etc/letsencrypt/live/wap.netrelay.cn/fullchain.pem (success)
  /etc/letsencrypt/live/www.netrelay.cn/fullchain.pem (success)

4个证书自动续期

更新证书(待补充)