我已经在服务器上配置了letencrypt并创建了一些证书。我想自动续订，但命令失败：（...）是我的域的占位符
./certbot-auto renew
Requesting to rerun ./certbot-auto with root privileges...
Saving debug log to /var/log/letsencrypt/letsencrypt.log
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Processing /etc/letsencrypt/renewal/(...).conf
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Cert is due for renewal, auto-renewing...
Plugins selected: Authenticator standalone, Installer None
Renewing an existing certificate
Performing the following challenges:
http-01 challenge for (...)
Cleaning up challenges
Attempting to renew cert ((...)) from /etc/letsencrypt/renewal/(...).conf produced an unexpected error: Problem binding to port 80: Could not bind to IPv4 or IPv6.. Skipping.
可能是什么？
也许服务器已经在运行，正在监听这些端口，或者您的用户帐户可能没有监听1024以下端口所需的权限。
也许日志文件包含更多信息。
如果在这些端口上运行Web服务器，则可能不希望将certbot作为服务器运行，而只是写入Web服务器的目录。
请参见https://certbot.eff.org/docs/using.html?highlight=renew#getting-certificates-and-choosing-plugins