I hate when this happens...

The page you were looking for, /404.shtml, doesn't exist on this website (tutorials.think-different.com) for one of the following reasons:
  • The page URL was typed in wrong.
  • The link on the previous page ((none)) is incorrect.
  • The page you are looking for has been renamed and no forwarding information was set by the site designer.
  • The page you are looking for has been deleted and no additional information is available.
  • You have reached the end of the Internet.
We just logged this error using your IP address: 35.173.42.124

If you would like to start of the beginning of the Internet, click Restart.

From W3.org:
The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address. This status code is commonly used when the server does not wish to reveal exactly why the request has been refused, or when no other response is applicable.

HTTP Error 404 - Not found

HTTP_REFERER: (none)
REDIRECT_STATUS: (none)
HTTP_USER_AGENT: CCBot/2.0 (https://commoncrawl.org/faq/)
HTTP_HOST: tutorials.think-different.com
REQUEST_URI: /404.shtml
REMOTE_ADDR: 35.173.42.124

Apache code (page name must be 404.shtml and located in the root directory):

HTTP_REFERER: <!--#echo var="HTTP_REFERER" -->
REDIRECT_STATUS: <!--#echo var="REDIRECT_STATUS" -->
HTTP_USER_AGENT: <!--#echo var="HTTP_USER_AGENT" -->
HTTP_HOST: <!--#echo var="HTTP_HOST" -->
REQUEST_URI: <!--#echo var="REQUEST_URI" -->
REMOTE_ADDR: <!--#echo var="REMOTE_ADDR" -->