If you are getting the above  error while accessing your  site , it  means your  domain  entry  is missing in the “Apache  ConfigurationFile”
(httpd.conf) .

You just   need to add the  entry  for your domain  in the httpd.conf file

ex :

======================================
root@server[#] vi  /etc/httpd/conf/httpd.conf

<VirtualHost 0.0.0.0:80>
ServerName domain.com
ServerAlias  www.domain.com
DocumentRoot /home/username/public_html/
ServerAdmin webmaster@domain.com
UseCanonicalName Off
CustomLog /usr/local/apache/domlogs/domain.com combined
CustomLog /usr/local/apache/domlogs/domain.com-bytes_log
ScriptAlias /cgi-bin/ /home/username/public_html//cgi-bin/
Include “/usr/local/apache/conf/userdata/std/2/domain.com/*.conf”
</VirtualHost>

:wq!
======================================
Note : Replace  domain.com  to  your  domain.

That’s  all  this  will  do it.