i have a domain, say example.com and I host web site using the Apache web server

my website config file (/etc/apache2/sites-available/example.com) looks as follows:

<VirtualHost example.com:80>
    ServerName example.com
    #ServerAlias www.example.com
    DocumentRoot "/var/www/sites/example.com/current/public"
    ErrorLog "/var/log/apache2/example.com-error_log"
    CustomLog "/var/log/apache2/example.com-access_log" common
    <Directory "/var/www/sites/example.com/current/public">
        Options All
        AllowOverride All
        Order allow,deny
        Allow from all
    </Directory>
    RewriteEngine On
    # Remove the www
    RewriteCond %{HTTP_HOST} ^www.example.com$ [NC]
    RewriteRule ^(.*)$ http://example.com/$1 [L,R=301]
</VirtualHost>

The website responds to example.com address but doesn't respond to www.example.com

Am I missing something?

The line that would cause it to respond to www.example.com is commented out...

Nope, the server doesn't respond to www.example.com regardless www.example.com (ServerAliase) is commented out or it's not commented out.

Thanks.

<VirtualHost example.com:80>


Try changing that to

<VirtualHost *:80>

You might also be missing an A record or CNAME for "www" in your DNS Manager (or wildcard DNS record to catch all subdomains). While I'm a big fan of obfuscating domains in open forums for script/code help, this is one case where having the actual domain would make it a lot easier to figure out the problem.

My settings seemed to be OK, I just had to clean up browser's cache or just hit Ctrl+F5