使用 certbot 对网站免费加 https 协议

cd /usr/local/src
wget https://dl.eff.org/certbot-auto
chmod a+x certbot-auto
./certbot-auto --nginx（自动）

出现以下内容表示成功：

IMPORTANT NOTES:

• Congratulations! Your certificate and chain have been saved at:
  /etc/letsencrypt/live/c.pensukeji.com/fullchain.pem
  Your key file has been saved at:
  /etc/letsencrypt/live/c.pensukeji.com/privkey.pem
  Your cert will expire on 2018-10-16. To obtain a new or tweaked
  version of this certificate in the future, simply run certbot-auto
  again with the "certonly" option. To non-interactively renew all
  of your certificates, run "certbot-auto renew"
• Your account credentials have been saved in your Certbot
  configuration directory at /etc/letsencrypt. You should make a
  secure backup of this folder now. This configuration directory will
  also contain certificates and private keys obtained by Certbot so
  making regular backups of this folder is ideal.

• If you like Certbot, please consider supporting our work by:

  Donating to ISRG / Let‘s Encrypt: https://letsencrypt.org/donate
  Donating to EFF: https://eff.org/donate-le

./certbot-auto renew --dry-run（测试自动续订）
./certbot-auto renew（执行自动续订）
定时任务
为了做到自动化，我们要设置计划任务定时检查更新
编辑/etc/crontab增加一行规则
**12** root ./usr/local/src/certbot-auto renew
详细过程，手动过程及各个版本的安装方式可到以下官网自行查看
Certbot官网网址：https://certbot.eff.org/

使用 certbot 对网站免费加 https 协议

原文：http://blog.51cto.com/12384628/2151060