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Suse openSUSE 12.2 Manual

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20.8 Troubleshooting
If Apache does not start, the Web page is not accessible, or users cannot connect to the
Web server, it is important to nd the cause of the problem. Here are some typical
places to look for error explanations and important things to check:
Output of rcapache2
Instead of starting and stopping the Web server with the binary /usr/sbin/
httpd2, rather use the rcapache2 script instead (described in Section 20.3,
“Starting and Stopping Apache” (page 376)). It is verbose about errors, and it even
provides tips and hints for xing conguration errors.
Log Files and Verbosity
In case of both fatal and nonfatal errors, check the Apache log les for causes,
mainly the error log le located at /var/log/apache2/error_log by default.
Additionally, you can control the verbosity of the logged messages with the
LogLevel directive if more detail is needed in the log les.
TIP: A Simple Test
Watch the Apache log messages with the command tail -F
/var/log/apache2/my_error_log. Then run rcapache2 restart.
Now, try to connect with a browser and check the output.
Firewall and Ports
A common mistake is to not open the ports for Apache in the rewall conguration
of the server. If you congure Apache with YaST, there is a separate option available
to take care of this specic issue (see Section 20.2.3, “Conguring Apache with
YaST” (page 369)). If you are conguring Apache manually, open rewall ports
for HTTP and HTTPS via YaST's rewall module.
If the error cannot be tracked down with the help of any these, check the online Apache
bug database at http://httpd.apache.org/bug_report.html. Additionally,
the Apache user community can be reached via a mailing list available at http://
httpd.apache.org/userslist.html. A recommended newsgroup is comp
.infosystems.www.servers.unix.
The Apache HTTP Server 399
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