环境： 操作系统：ubuntu 18.04 letsencrypt下载地址： https://github.com/letsencrypt/letsencrypt.git nginx：nginx/1.14.0 (Ubuntu) 早期直接使用 ./letsencrypt-auto 命令可以生成，现在已经不行了，会提示 Skipping bootstrap because certbot-auto is deprecated on this system. Your system is not supported by certbot-auto anymore. Certbot cannot be installed. Please visit https://certbot.eff.org/ to check for other alternatives. 原因需要安装 snap 操作过程(具体先不注释了)： 详见请参考： https://certbot.eff.org/lets-encrypt/ubuntubionic-nginx apt update apt install snapd -y <