Apache2 NameVirtualHost *:80 has no VirtualHosts Error and Solution

The "NameVirtualHost *:80 has no VirtualHosts" error in Apache2 occurs when the NameVirtualHost directive is used, but no virtual hosts are defined for the specified address and port. This can happen if the NameVirtualHost directive is used in the configuration file, but no virtual host definitions are present.

To fix this error, you can either remove the NameVirtualHost directive from the configuration file, or add at least one virtual host definition for the specified address and port.

For example, if the NameVirtualHost directive is defined in the httpd.conf file like this:

NameVirtualHost *:80

You can fix the error by adding a virtual host definition for the specified address and port, like this:

<VirtualHost *:80>
    ServerName example.com
    DocumentRoot /var/www/html
</VirtualHost>

After modifying the configuration file, restart Apache for the changes to take effect. This should resolve the "NameVirtualHost *:80 has no VirtualHosts" error.