【最新玩法总结】CentOS下通过CertBot工具申请免费Let‘s Encrypt泛域名ssl证书【兼容泛域名的ssl,很强大哦】

痛定思痛。 2021-09-03 07:50 445阅读 0赞

官方安装步骤：[https://certbot.eff.org/lets-encrypt/centosrhel7-nginx][https_certbot.eff.org_lets-encrypt_centosrhel7-nginx]

centos7如何安装snapd：

1、[https://snapcraft.io/docs/installing-snap-on-fedora][https_snapcraft.io_docs_installing-snap-on-fedora]

2、[https://blog.csdn.net/qq\_37769323/article/details/104124108][https_blog.csdn.net_qq_37769323_article_details_104124108]

**特殊情况：snap运行报错：**【snap error: cannot communicate with server: Post http://localhost/v2/ no such file or directory】的解决方案：**重启即可【systemctl restart snapd.service】**

如果centos的内核为：kernel  3.10.0-123.4.2.el7.x86\_64 则会报错：error: system does not fully support snapd: cannot read the value of fs.may\_detach\_mounts kernel  
       parameter: open /proc/sys/fs/may\_detach\_mounts: no such file or directory

此情况请升级你的centos内核，参考：**注意：升级内核之前必须先执行 yum update 更新所有的包，在参考[https://linux.cn/article-8310-1.html][https_linux.cn_article-8310-1.html]方法，否则无法更新成功！****【升级linux内核的方法参考：[https://linux.cn/article-8310-1.html][https_linux.cn_article-8310-1.html]】**

**旧的安装方式【定时器自动更新都是使用命令**certbot -q renew**】：**[https://blog.csdn.net/weixin\_43343144/article/details/108312285][https_blog.csdn.net_weixin_43343144_article_details_108312285]

[https_certbot.eff.org_lets-encrypt_centosrhel7-nginx]: https://certbot.eff.org/lets-encrypt/centosrhel7-nginx
[https_snapcraft.io_docs_installing-snap-on-fedora]: https://snapcraft.io/docs/installing-snap-on-fedora
[https_blog.csdn.net_qq_37769323_article_details_104124108]: https://blog.csdn.net/qq_37769323/article/details/104124108
[https_linux.cn_article-8310-1.html]: https://linux.cn/article-8310-1.html
[https_blog.csdn.net_weixin_43343144_article_details_108312285]: https://blog.csdn.net/weixin_43343144/article/details/108312285