My CentOS Apache 2 (httpd) webserver will not start. It was working fine but I made few changes to httpd.conf and it is not restarting. What are some things to check in order to solve my issues?
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I have a rented dedicated LAMP solution stack server. I need to know what version of Apache I am running. How do I find out my Apache server version? How do I find out what modules loaded using command line option on Linux or Unix like operating systems?
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Question:I’m using Apache 2 to host multiple site on a single host using Apache name based VirtualHost feature. However, Apache is displaying lots of warning as follows:

Performing sanity check on apache22 configuration:
[Portal Oct 05 06:59:34 2008] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Portal Oct 05 06:59:34 2008] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Portal Oct 05 06:59:34 2008] [warn] NameVirtualHost 81.aaa.www.yyy:80 has no VirtualHosts
Syntax OK
Stopping apache22.
Waiting for PIDS: 14968.
Syntax OK
Starting apache22.
[Portal Oct 05 06:59:36 2008] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Portal Oct 05 06:59:36 2008] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Portal Oct 05 06:59:36 2008] [warn] NameVirtualHost 81.aaa.www.yyy:80 has no VirtualHosts

How do I fix this warning and host multiple websites under UNIX / Linux Apache 2 webserver?
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Q. I’m running Apache 2 server under FreeBSD jail. However, I see lots of warning error messages in /var/log/httpd-error.log as follows:

[Sat Sep 20 20:47:09 2008] [warn] (61)Connection refused: connect to listener on 0.0.0.0:80
[Sat Sep 20 20:47:10 2008] [warn] (61)Connection refused: connect to listener on 0.0.0.0:80
[Sat Sep 20 20:47:11 2008] [warn] (61)Connection refused: connect to listener on 0.0.0.0:80

How do stop all these warning messages flooding my Apache log files?
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Q. I’m running Apache 2 Web sever under CentOS Linux and getting an error that read as follows:

[Wed Sep 17 21:53:49 2008] [error] [client 122.1xx.y9.zzz] client denied by server configuration: /var/www/examples.com/

How do I fix this error?
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Q. I’ve installed Apache2 and mod_security21 under FreeBSD. Whenever I try to restart apach22 process I get following error:

Performing sanity check on apache22 configuration:
httpd: Syntax error on line 106 of /usr/local/etc/apache22/httpd.conf: Cannot load /usr/local/libexec/apache22/mod_security2.so into server: /usr/local/libexec/apache22/mod_security2.so: Undefined symbol “xmlFree”

How do I fix this problem?
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