如何查看我的网站证书有效日期

以前普通网站好像都不太需要弄ssl证书的，现在搞得啥网站都需要ssl证书了。不然浏览器就给你http链接上弄个“不安全”字样。

使用 OpenSSL 命令：

打开终端或命令行界面，并运行以下命令：

openssl x509 -in /path/to/your/certificate.pem -text -noout

将 /path/to/your/certificate.pem 替换为您的证书文件的实际路径。

例如我为我的网站申请的证书自动存放在位/etc/letsencrypt/live/kuyour.top/文件夹里面：

/etc/letsencrypt/live/kuyour.top/fullchain.pem

/etc/letsencrypt/live/kuyour.top/privkey.pem

查询我为我的网站申请的证书有效日期：

openssl x509 -in /etc/letsencrypt/live/kuyour.top/fullchain.pem -text -noout

你申请成功后会提示类似下面的文字：

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/kuyour.top/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/kuyour.top/privkey.pem
   Your certificate will expire on 2025-01-28. To obtain a new or
   tweaked version of this certificate in the future, simply run
   certbot again. To non-interactively renew *all* of your
   certificates, run "certbot renew"
 - 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