Server OS usage index

Question

Is there any server OS usage index (like tiobe index for programming languages)? I haven't found anything better than google trends

Answer 1

maybe have a look at http://distrowatch.com/ seems to be along the lines of what your after

Answer 2

Netcraft tracks web server/OS marketshare.

Some caveats:

• It's fairly easy to "trick" Netcraft with headers.
• Netcraft can only scrape pages that are publicly available. This means it misses databases, business logic, and intranet sites.
• It also means that their stats may be skewed by load balancers.
• And they're web biased, so they're not tracking MX servers, ssh servers, etc.