How many WordPress sites are on Linux servers?

Um… pass. I don’t think there’s a way we could come up with even a semi-accurate estimate. www.ads-software.com has no direct connection to the millions of self-hosted WordPress sites.

Most? More than half I’m positive.

Actually wait, where are those metrics… Okay, go to https://www.ads-software.com/news/2011/08/state-of-the-word/ and download the survey. That MAY have some of what you need.

But since there’s no reporting feature for who uses what, we can’t know for sure.

Thanks @ipstenu !