You'll definitely find what you're looking for here.
http://www.macosxtips.co.uk/index_files/terminal-commands-fo...
To save you some time, add a folder as follows:
mdimport -f /Library
To save you some time, add a folder as follows:
mdimport -f /Library
kMDItemDisplayName == "com.apple.RemoteDesktop.plist"
&& kMDItemSupportFileType != MDSystemFile
which returns nothing on my system, rather than simply kMDItemDisplayName == "com.apple.RemoteDesktop.plist"
which returns three results, one each in subdirectories of /System/Library, /Library, and ~/Library.There's an option in the "full" Spotlight search window that lets you control this for any given search, under "Other..." in the drop-down you get when you click "+" to add criteria. It's called, logically enough, "System files".
Incidentally, the mdfind command line tool doesn't have this behavior by default.