1. Install the extension CheckUser (http://meta.wikimedia.org/wiki/Help:CheckUser) and use it. 2. What do you mean? You can ask the sysops to specify it in their user page, and there is the page Special:Listadmins. An administrator can configure his signature in talk pages to show "USERNAME (sysop)", of course, but not in the history pages.
Uwe Brauer wrote:
Hello
May be these are very trivial question:
How can I find out, whether the same user has various accounts and give the false impression that many users contribute. I presume it must be via the IP (also in case of multi user machines that might be misleading).
How can I find out that someone is a administrator of a specific page? Right there exist a long list of administrators, but couldn't a administrator get a specific signature or something like this?
Thanks
Uwe Brauer.
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