How to debug an apache virtual host configuration?

Question

Once again, I have a problem with my apache virtual host configuration. (The default configuration is used instead of my specific one).

The problem is not really the misconfiguration but how to solve it.

Does anyone has good advices to do resolve this kind of problem quickly?

Some more informations.

The default conf file is this one:

NameVirtualHost *
<VirtualHost *>
        ServerAdmin webmaster@localhost

        DocumentRoot /var/www/
        <Directory />
                Options FollowSymLinks
                AllowOverride None
        </Directory>
        <Directory /var/www/>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride None
                Order allow,deny
                allow from all
        </Directory>

        ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
        <Directory "/usr/lib/cgi-bin">
                AllowOverride None
                Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
                Order allow,deny
                Allow from all
        </Directory>

        ErrorLog /var/log/apache2/error.log

        # Possible values include: debug, info, notice, warn, error, crit,
        # alert, emerg.
        LogLevel warn

        CustomLog /var/log/apache2/access.log combined
        ServerSignature On

    Alias /doc/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
        Options Indexes MultiViews FollowSymLinks
        AllowOverride None
        Order deny,allow
        Deny from all
        Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>

</VirtualHost>

And the virtual host config that doesn't apply is this one:

<VirtualHost *:*>

ProxyPreserveHost On
ProxyPass / http://ip.ip.ip.ip:8088/
ProxyPassReverse / http://ip.ip.ip.ip:8088/
ServerName wiki.mydomain.com

</VirtualHost>

Answer 1

Syntax check

To check configuration files for syntax errors:

# Red Hat-based (Fedora, CentOS), Arch-based and OSX
httpd -t

# Debian-based (Ubuntu)
apache2ctl -t

# MacOS
apachectl -t

List virtual hosts

To list all virtual hosts, and their locations:

# Red Hat-based (Fedora, CentOS), Arch-based and OSX
httpd -S

# Debian-based (Ubuntu)
apache2ctl -S

# MacOS
apachectl -S