Fixed "Apache2 Startup warning: NameVirtualHost *:80 has no VirtualHosts"

Based on the information from the following two links, I could remove this annoying error message in my linux box by commenting out the first line (i.e., "NameVirtualHost: *:80" ) in "/etc/apache2/ports.conf":

• http://serverfault.com/questions/1405/apache2-startup-warning-namevirtualhost-80-has-no-virtualhosts
• http://wiki.apache.org/httpd/CommonMisconfigurations