It is a well known fact that Google is one the best search engines on the Web, or rather say "it's the best".
When we talk about Google and yahoo search index's, Google has atleast ten times the number of yahoo or MSN(now yahoo's search index's have improved to a certain extent, but the lead remains the same)
People needs for search engines is very more like a primitive necessity when it comes to the Web Surfing part of it. It would also be contrary for one to expect someone else to know the whole list of site's available on the web. There might be well over 1,00,00,000 sites, I don't think it will matter even if there were few more zero's to right of that spell bounding figure.
But getting to the point, Linux as an OS, is no where as popular to windows. When it comes to the brighter side of being a Linux user its more like the other way round. Go Linux everyone!!

LINUX IS THE BEST

So all the new and existing users will still need information on how to mount, activate networking, etc. So the best way would be search the net
For Linux alone google has set aside separate index's and i am one of them who is going to benefit from it
The google search site for linux is
http://www.google.com/linux

benefit from the best