sudo grep AH02572 /var/log/apache2/error.log.Invoke grep like this on Ubuntu and Debian-derived systems: While there are other tools like less that you could use to find evidence of an AH02572 error, grep will only display lines with the error code so you can be sure of whether you’re affected by the issue. To examine Apache’s logs for evidence of an AH02572 error message, use the grep utility to search for the error code in the appropriate log file for your distribution. On CentOS, Fedora, and RedHat-derived systems, Apache defaults to logging errors to the /var/log/httpd/error_log file. On Ubuntu and Debian-derived systems, Apache defaults to using /var/log/apache2/error.log for error messages. Typically, Apache is configured to log error messages to a separate log file from access requests in order to help with debugging, monitoring, and alerting. Examining Apache’s LogsĪpache logs diagnostic information about its internal operations to various locations, which differ depending on your Linux distribution. To diagnose and resolve an AH02572 error, the next section explains how to examine Apache’s logs directly. Examining the systemd logs for Apache using the journalctl command, or checking Apache’s configuration files with apachectl configtest will not help locate information that you can use to troubleshoot the error. However, there is nothing in the output that indicates an AH02572 error message. The important lines to note are the ones showing that Apache failed to start. Jul 31 16:02:41 7d6ef84b6907 systemd: Failed to start The Apache HTTP Server. Jul 31 16:02:41 7d6ef84b6907 systemd: rvice: Control process exited, code=exited status=1 Jul 31 16:02:41 7d6ef84b6907 apachectl: The Apache error log may have more information. Jul 31 16:02:41 7d6ef84b6907 systemd: Starting The Apache HTTP Server. Process: 36 ExecStart=/usr/sbin/apachectl start (code=exited, status=1/FAILURE) Loaded: loaded (/lib/systemd/system/rvice enabled vendor preset: enabled)ĭrop-In: /lib/systemd/system/Īctive: failed (Result: exit-code) since Fri 16:02:41 UTC 20s ago To examine Apache’s status with systemctl, run the following command on Ubuntu and Debian derived Linux distributions: Its systemctl status will show a failed message. When you are troubleshooting an AH02572: Failed to configure at least one certificate and key error message, Apache will not be running. If you have already determined that your Apache server is affected by an AH02572 error and you would like to skip the troubleshooting steps, the Adding an SSL Certificate to Apache section at the end of this tutorial explains how to resolve the error. You will also learn how to set the SSLCertificateFile and SSLCertificateKeyFile directives to resolve the message. In this tutorial you will learn how to troubleshoot an AH02572 error using the methods described in the How to Troubleshoot Common Apache Errors tutorial at the beginning of this series. The error will prevent Apache from starting up, and the error message itself will be found in Apache’s logs. Apache generates an AH02572: Failed to configure at least one certificate and key error message when it is configured to use the ssl module, but is missing a TLS/SSL public certificate and corresponding private key.
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