![]() The second flag that you will use is the same -no-pager option that you used with systemctl, which will output the entire log to your screen at once. Using this option will help restrict the volume of log entries that you need to examine when checking for errors. It will limit the output of the command to log entries beginning at 00:00:00 of the current day only. The first flag that you will add to the journalctl invocation is the -since today flag. When invoking journalctl, there are two specific flags that will help you locate specific messages if there is a large volume of log entries. To examine the systemd logs for Apache you will use the journalctl command. If your systemctl output does not indicate a value that you can use for the ServerName directive, the next section of this tutorial explains how to examine the systemd logs using journalctl to locate an AH00558 message. In that section you will configure Apache with a safe default ServerName value using the IP address for localhost: 127.0.0.1. If your systemctl output contains an auto-detected value of any IP address or hostname, skip to the last section of this tutorial, Setting a Global ServerName Directive to resolve the issue. If you are troubleshooting an AH00558 message, the IP address that is detected may be different, or it may be a human readable DNS name. ![]() In this example, it’s the server’s public IP address: 172.17.02. Essentially, it informs you that Apache couldn’t find a valid ServerName directive in its configuration file, so it will use the first IP address it detects. The highlighted line that contains the AH00558 message is the important one. Jul 29 14:30:03 68e2cf19f3f1 systemd: Started The Apache HTTP Server. Set the 'ServerName' directive globally to suppress this message Jul 29 14:30:03 68e2cf19f3f1 apachectl: AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Jul 29 14:30:03 68e2cf19f3f1 systemd: Starting The Apache HTTP Server. Process: 34 ExecStart=/usr/sbin/apachectl start (code=exited, status=0/SUCCESS) Loaded: loaded (/lib/systemd/system/rvice enabled vendor preset: enabled)ĭrop-In: /lib/systemd/system/Īctive: active (running) since Wed 14:30:03 UTC 33min ago On Ubuntu and Debian-derived Linux distributions, run the following to check Apache’s status: The output from systemctl will in many cases contain all the information that you need to resolve the message. The first step when you are troubleshooting an AH00558: Could not reliably determine the server's fully qualified domain name message is to check Apache’s status using systemctl. If you have already determined that your Apache server is affected by an AH00558 message and you would like to skip the troubleshooting steps, the Setting a Global ServerName Directive step at the end of this tutorial explains how to resolve the message. ![]() You will also learn how to set a ServerName directive to resolve the message. In this tutorial you will learn how to detect an AH00558 message using the methods described in the How to Troubleshoot Common Apache Errors tutorial at the beginning of this series. The message is mainly for informational purposes, and an AH00558 error will not prevent Apache from running correctly. An Apache AH00558: Could not reliably determine the server's fully qualified domain name message is generated when Apache is not configured with a global ServerName directive.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |